JP2007004611A - Image display control method, electronic conference system, program and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously display information displayed on a display by a presenter and information that is not displayed on the display by the presenter on the screen of an own-computer in an electronic conference system. <P>SOLUTION: In an image display control method in the electronic conference system in which a plurality of computers are connected through a network and content that is completely the same as content displayed on a display of one computer among the computers is synchronized with and displayed on all of the computers, when the own-computer is not a presenter, information displayed on a display by the presenter and information that is not displayed on the display by the presenter are simultaneously displayed on the screen of the own-computer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic conference system and screen in which a plurality of computers are connected via a network, and the same contents as those displayed on the display of one of these computers are displayed in synchronization with all the computers. The present invention relates to a display control method, a program, and a storage medium.

  When electronic presentation materials created with PowerPoint (registered trademark), etc. are used, one computer is installed for all conference participants, and the presenter makes a presentation based on the materials displayed on the computer screen In addition, an electronic conference system has been put into practical use in which other participants see the same material as the presenter displayed on the screen of their computer and answer and answer the presentation.

In the electronic conferencing system, materials are placed on a desktop conferencing system and web server that share the same software in a format that shares the same software with each other over the network, and conference participants use the web browser to share the same Web conferencing system that shares materials.
In these systems, conference participants can only see the same screen as the presenter, and they cannot freely view other parts of the material themselves.

  Patent Document 1 discloses means for solving this point. The means disclosed in Patent Document 1 are as follows: (1) Presentation mode (state of being a presenter), (2) Shared mode (other than presenter, same material as presenter) (3) Stand-alone mode (a state where you are looking at a place (document, position) other than the presenter, different from the presenter), and each conference participant is in these three states Each participant's state is managed by each computer.

  The conference material is distributed in advance or can be downloaded immediately. During the conference, information on which page the presenter is explaining is notified to all conference participants.

  During the conference, the computer of the conference participant transmits information on the material (presentation mode), receives it (shared mode), or ignores the received content (independent mode) according to its own state. Such an environment setting and its own state management by the participant's computer made it possible for the conference participants to freely view the materials without reducing the efficiency of the conference.

JP 2000-92217 A

  However, in the conventional conference system described above, only the same screen as the presenter can be seen during the conference, and other pages of the conference material cannot be viewed.

  In the method disclosed in Patent Document 1, when the conference participant is in the independent mode, a page different from the page displayed by the presenter of the conference material can be viewed during the conference. There was a drawback that the progress of the meeting could not be seen.

  In the present invention, since participants can freely view the material at the same time as the conference material during the conference, it is possible to deepen the understanding of the presentation content compared to the case where the material can be viewed unilaterally. Furthermore, to provide a screen display control method, an electronic conference system, a screen display control program, and a storage medium that can understand the contents of an ongoing conference even during document browsing because it does not have a browsing mode With the goal.

  According to the screen display control method in the electronic conference system of the present invention, a plurality of computers are connected via a network, and the same contents as those displayed on the display of one of these computers are displayed on all the computers. In the screen display control method in the electronic conference system that displays synchronously, when the computer is not the presenter, the information that the presenter displays on the display and the information that the presenter does not display on the display at the same time Display on the screen of the computer.

  In the electronic conference system of the present invention, a plurality of computers are connected via a network, and the same contents as those displayed on the display of one of these computers are displayed in synchronization with all the computers. In the electronic conference system, when the own computer is not a presenter, the presenter receives the same page information as the page displayed on the display, and displays the shared information display area display means on the display of the own computer; Means for displaying arbitrary page information other than the page displayed by the presenter in the information editing area of the display of the own computer, and the presenter displaying the page information being edited in the information editing area of the own computer on the display Page that reflects the editing results on the local computer And displays the broadcast on the display of the presenter, and a means for displaying on the display of all other said computers.

  In the screen display control method of the present invention, a plurality of computers are connected via a network, and the same contents as those displayed on the display of one of these computers are displayed in synchronization with all the computers. In the electronic conference system, the screen display control method provided in each of the computers, the step of determining whether the own computer is a presenter, and switching the page when the own computer is a presenter, A step of repeating until the computer gives up the presentation right to notify all other computers of the switched page information, and information displayed by the presenter on the display when the computer is not a presenter The same information is received and displayed on the display of the local computer. Displaying the shared information display area, and when the own computer is not a presenter, the display of the own computer displays any page information other than the page displayed by the presenter on the display of the own computer. The information editing area, and when the presenter displays the page being edited in the information editing area of the own computer on the display, the page information reflecting the editing result on the own computer is announced. And displaying on the display of all other computers.

  The screen display control program of the present invention has a plurality of computers connected via a network, and displays the same contents as those displayed on the display of one of these computers in synchronism with all the computers. In the electronic conference system, a screen display control program provided in each of the computers, a determination module for determining whether the own computer is a presenter, and performing page switching when the own computer is a presenter, A page switching module that repeats until all the other computers are notified of the switched page information until the computer gives up the presentation right, and when the computer is not a presenter, the presenter displays it on the display. Receiving the same information as Shared information display module displayed in the shared information display area displayed on the display of the own computer, and arbitrary page information other than the page displayed by the presenter on the display of the own computer when the own computer is not a presenter Information editing module for displaying in the information editing area of the display of the own computer, and when the presenter displays the page information being edited in the information editing area of the own computer on the display, the editing result on the own computer is The reflected page information is displayed on the presenter's display, and an editing information distribution module for displaying on the display of all other computers.

  The storage medium of the present invention stores the program so as to be readable by a computer.

  In the present invention, since the conference participants can freely view the material at the same time as the conference material during the conference, it is possible to deepen the understanding of the presentation content compared to the case where the material can be shown unilaterally. Furthermore, since there is no browsing mode, it is possible to understand the contents of the ongoing conference even while the document is being browsed.

  In addition, it is possible to edit another page while synchronizing the display on the common screen so that the progress of the conference can be understood. For example, the presenter changes during the conference. In such a case, while the previous presenter is presenting, the next presenter can edit the material in preparation.

The best mode for carrying out the invention will be described below in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a conceptual diagram showing a configuration of an electronic conference system applicable to each embodiment of the present invention.
In FIG. 1, reference numeral 1 denotes a network such as a LAN. Reference numeral 2 denotes an electronic conference server (server computer) that implements the present invention. Reference numerals 3 to 6 denote electronic conference system clients (personal computers) in which conference participants connect to the electronic conference system server and participate in the electronic conference. In the electronic conference system, the page information of the presenter (in this case, the electronic conference client 3) is transmitted to the other electronic conference system clients 4 to 6 through the electronic conference system server 2. The electronic conference system clients 4 to 6 display the received page information of the presenter on the display.

  Although not shown in detail in FIG. 1, each of the electronic conference system server 2 and the electronic conference clients 3 to 6 is a standard component (for example, CPU, RAM, ROM, hard disk) mounted on a general-purpose computer. , External storage device, network interface, display, keyboard, mouse, etc.). Further, it is assumed that each computer is assigned a unique IP address, for example.

  FIG. 2 is a conceptual diagram of a conference material reference window displayed on the display of the electronic conference system client realized in each embodiment of the present invention. Reference numeral 10 denotes a conference material reference window. 11 to 14 are page tabs of the conference material, and the page of the conference material can be switched by selecting the page tab by a click operation or the like. 11 is colored to indicate that the currently displayed conference material is the first page. The number of page tabs may be any number, a number of page tabs may be prepared by scrolling the page tabs, and tabs such as page feed and page return may be prepared. Reference numeral 15 denotes a shared information display area in which the same page information synchronized with the presenter's page information is displayed in each electronic conference system client. Reference numeral 16 denotes a drawing palette in which tools for drawing annotations and inserting objects such as texts and diagrams into the conference material displayed in the shared information display area are prepared. Details of prepared tools are omitted.

  2 may be an application executed on a client, or may be executed on a Web browser as a Web application. Alternatively, it may be executed using middleware such as Macromedia Flash (registered trademark) or J2EE (registered trademark). Further, although the tab is colored to represent the current page, other expression methods may be used, and the display may not be changed.

  FIG. 3 shows a state in which the presenter has selected the page tab of the second page of the conference material by a click operation or the like in FIG. 2, and a click operation or the like is performed on the page tab, and the tab is highlighted. Indicates the state. Here, the tabs are reversed, but other expression methods may be used, or the display may not be changed.

  FIG. 4 shows a state in which the page is switched after the presenter selects page 2 in FIG. The page tab 12 is colored so that the color attached to the page tab 11 disappears and the conference material currently displayed is the second page.

  FIG. 5 is a conceptual diagram of a conference material reference window displayed on the display of the editor (electronic conference system client 4). 18 is a conceptual diagram of a conference material reference window for editors. A shared information display area 15 is an area where the same page information is displayed in synchronization with the presenter's page information in each electronic conference system client. Reference numeral 17 denotes an information editing area, which is an area for the editor to edit the meeting material regardless of the meeting material displayed by the presenter.

  In FIG. 5, the same page information as the presenter's page is displayed in the shared information display area 15, and the page information of the third page being edited by the editor is displayed in the information editing area 17. Show.

  FIG. 6 is a conceptual diagram showing the state of the conference material reference window displayed on the display of each electronic conference system client during the electronic conference. Reference numeral 10 denotes a conference material reference window displayed on the display of the computer A. Reference numeral 19 denotes a conference material reference window displayed on the display of the computer B. Reference numeral 18 denotes a conference material reference window displayed on the display of the computer C. Here, computer A is the presenter, computer C is the editor, and computer B is the participant. The page information of the first page of the conference material is displayed in the shared information display area 15 of the conference reference window of each electronic conference system client, and the conference material is displayed in the information editing area 17 of the editor's conference material reference window 18. The page information of the third page is displayed.

Reference numeral 17 denotes a state in which the editor is drawing an annotation in the information editing area of the conference material reference window 18.
A state in which the page tab 12 is selected to display the second page in the presenter's conference material reference window 10 is shown.

  FIG. 7 is a diagram showing a state after the presenter in FIG. 6 switches to the second page. The conference material displayed in the shared information display area 15 of the conference material reference window of each electronic conference system client is the second page, and the annotation drawing is continued in the information editing area 17 of the editor's conference material reference window 18. It shows the state. Here, the presenter's authority is lost because the presenter's operation is not performed until the electronic conference system client of the computer A has passed a predetermined time, and the presenter's authority is obtained by the page switching operation using the conference material reference window 19 of the computer B. This is given to the conference material reference window 19 of the computer B, and shows a state where the page tab 13 of the third page is selected.

  FIG. 8 is a diagram illustrating a state after the presenter in FIG. 7 switches to the third page. The meeting material displayed in the shared information display area 15 of the meeting material reference window of each electronic conference system client is the third page, and the annotation drawing is continued in the information editing area 17 of the editor's meeting material reference window 18. It shows the state. Annotation drawn by the editor on the third page of the conference material during the electronic conference is reflected in the conference material and is also displayed in the conference material displayed in the shared information display area 15 Yes. In the information editing area 17 of the editor's meeting material reference window 18, annotation drawing is continuously performed.

  FIG. 9 shows the third page of the conference material displayed in the shared information display area 15 of the conference material reference window of each electronic conference system client in FIG. 8 and is displayed in the information editing area 17 of the conference material reference window 18 of the editor. The conference material being displayed is the third page, and the drawing of the annotation is continued in the information editing area 17 of the conference material reference window 18 of the editor. Compared with the state of FIG. 8, the annotation drawn on the conference material displayed in the shared information display area 15 of the conference material reference window of each electronic conference system client is the information editing in the conference material reference window 18 of the editor. This is performed in conjunction with the drawing of the annotation in the area 17.

  The page tab 13 of the 4th page is selected by the page switching operation by the meeting material reference window 19 of the computer B.

  FIG. 10 is a diagram showing a state after the presenter in FIG. 9 switches to the fourth page. The meeting material displayed in the shared information display area 15 of the meeting material reference window of each electronic conference system client is the fourth page, and the drawing of annotation is continued in the information editing area 17 of the meeting material reference window 18 of the editor. It shows the state. Even if the page switching operation is performed by the conference material reference window 19 of the computer B, the information editing area 17 of the editor's conference material reference window 18 does not affect the drawing of the annotation.

  In this way, in an electronic conference system in which a plurality of computers are connected via a network, and exactly the same content displayed on the display of one of these computers is displayed in synchronization with all computers, When the own computer is not a presenter, information displayed on the display by the presenter and information not displayed on the display by the presenter can be simultaneously displayed on the screen of the own computer.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS.
FIG. 11 shows a state where the editor is drawing an annotation in the shared information display area 15 of the conference material reference window 18 in the state of FIG. 8 of the first embodiment. In the electronic conference system of the present invention, it is possible to insert an annotation drawing, an object such as a text or a figure into the conference material displayed in the shared information display area 15 in this way.
When the editor draws an annotation in the shared information display area 15 of the conference material reference window 18, the result is reflected in the shared information display area 15 of the conference material reference windows 10 and 19 of other electronic conference clients. Further, it is reflected in the conference material displayed in the information editing area 17 of the editor's conference material reference window 18.

  FIG. 12 shows the third page of the conference material displayed in the shared information display area 15 of the conference material reference window of each electronic conference system client in FIG. 11 and is displayed in the information editing area 17 of the conference material reference window 18 of the editor. The conference material being displayed is the third page, and the drawing of the annotation is continued in the shared information display area 15 of the conference material reference window 18 of the editor. Compared with the state of FIG. 11, each electronic conference system client is drawn in the conference material displayed in the shared information display region 15 of the conference material reference window and the information editing region 17 of the editor's conference material reference window 18. The annotation is performed in conjunction with the drawing of the annotation in the shared information display area 15 of the meeting material reference window 18 of the editor.

The page tab 13 of the 4th page is selected by the page switching operation by the meeting material reference window 19 of the computer B.
FIG. 13 is a diagram showing a state after the presenter in FIG. 10 switches to the fourth page. The conference material displayed in the shared information display area 15 of the conference material reference window of each electronic conference system client is the fourth page, and the information editing area 17 of the editor's conference material reference window 18 and the shared information display. The position of the area 15 is changed, and the drawing of the annotation is continued in the information editing area 17 of the meeting material reference window 18 of the editor. Even if the page switching operation is performed by the conference material reference window 19 of the computer B, the annotation drawing in the conference material reference window 18 of the editor is performed by switching the shared information display region 15 and the information editing region 17 to the information editing region 17. The drawing of the annotation is continued, and the drawing of the annotation is not affected.

  In this way, an electronic conference system in which a plurality of computers are connected via a network and the same content as that displayed on the display of one of these computers is displayed in synchronization with all the computers. When the computer is not the presenter, the information that the presenter displays on the display and the information that the presenter does not display on the display can be displayed on the screen of the computer at the same time. When the current computer is not a presenter, the information displayed on the display by the presenter can be drawn on the screen displayed on the current computer, and when the presenter switches pages. The information that the presenter displays on the display and the presenter displays on the display. By switching the display of information not shown, drawing on the own computer can be continued.

  In the first and second embodiments described above, there are three participants in the electronic conference, but any number may be used.

  It is to be noted that the object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the embodiment to a system or apparatus, and a computer (or CPU, MPU, etc.) of the system or apparatus as the storage medium. This can also be achieved by reading and executing the stored program code.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code and the storage medium storing the program code constitute the present invention.

  Examples of the storage medium for supplying the program code include a floppy (registered trademark) disk, a hard disk, a magneto-optical disk, a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD-RAM, and a DVD. -R, DVD + R, DVD-RW, DVD + RW, HD-DVD, Blu-ray Disc, magnetic tape, nonvolatile memory card, ROM, etc. can be used. Alternatively, the program code may be downloaded via a network.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) running on the computer based on the instruction of the program code. A case where part or all of the actual processing is performed and the functions of the above-described embodiments are realized by the processing is also included.

  Further, after the program code read from the storage medium is written to a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. This includes the case where the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.

It is a figure which shows typically the structure of the electronic conference system which concerns on embodiment of this invention. FIG. 5 is a configuration diagram showing page 1 of a conference material reference window according to an embodiment of the present invention. FIG. 3 is a diagram in which a P2 tag is selected to switch to page 2 in FIG. FIG. 4 is a diagram switched from FIG. 3 to page 2; FIG. 6 is a configuration diagram in which page 1 is displayed in a shared information display area and page 3 is displayed in an information editing area of a conference material reference window for editors according to an embodiment of the present invention. It is a figure showing the conference material reference window of the presenter, participant, and editor who are performing electronic conference. It is the figure where the presenter 10 is going to switch the display page to 2. FIG. FIG. 7 is a diagram in which the display page is switched to 2 from FIG. 6, the presenter is changed from 10 to 19, and the presenter 19 is switching the display page to 3. FIG. 8 is a diagram in which the display page is switched to 3 from FIG. 7 and an editor's drawing is displayed in each conference material reference window. FIG. 9 is a diagram in which the presenter 19 is about to switch the display page to 4 from FIG. 8. FIG. 10 is a diagram in which the display page is switched to 4 from FIG. 9 and the editor continues drawing on page 3 in the information editing area. FIG. 9 is a diagram in which the editor in FIG. 8 starts drawing in the shared information display area. FIG. 12 is a diagram in which the presenter 19 is changing the display page to 4 from FIG. 11. FIG. 13 is a diagram in which the display page is switched to 4 from FIG. 12 and the editor's shared information display area and information editing area are switched.

Explanation of symbols

1. A network such as a LAN connecting the computer of the conference system and each computer 2. Electronic conference system server 3. Electronic conference system client (presenter)
4 Electronic conference system client (editor)
5 Electronic conference system client (participants)
6 Electronic conference system client (participants)
10 Teleconference system client (presenter / participant) conference material reference window 11 Tab for switching to page 1 of conference material (including selection status)
12 Tab to switch to page 2 of meeting materials (including selection status)
13 Tab to switch to page 3 of meeting materials (including selection status)
14 Tab to switch to page 4 of meeting materials (including selection status)
15 shared information display area 16 drawing palette 17 for editing 17 information editing area 18 meeting material reference window 19 of electronic conference system client (participant / presenter) meeting material reference window of electronic meeting system client (editor)

Claims (15)

A screen display control method in an electronic conference system in which a plurality of computers are connected via a network, and the same contents as those displayed on the display of one of these computers are displayed synchronously on all the computers. In
An electronic conference characterized in that when the present computer is not a presenter, information displayed on the display by the presenter and information not displayed on the display by the presenter are simultaneously displayed on the screen of the present computer. Screen display control method in the system. In an electronic conference system in which a plurality of computers are connected via a network, and the same contents as those displayed on the display of one of these computers are displayed synchronously on all the computers,
When the own computer is not a presenter, the presenter receives the same page information as the page displayed on the display, and displays the shared information display area to display on the display of the own computer;
Means for displaying arbitrary page information other than the page displayed by the presenter in the information editing area of the display of the own computer;
When the presenter displays page information being edited in the information editing area of the own computer on the display, the page information reflecting the editing result in the own computer is displayed on the display of the presenter, Means for displaying on the display of all the other computers. When the computer is not a presenter, the page displayed on the display of the presenter is switched, and the page information being edited in the information editing area of the computer is displayed on the display of the presenter. The page displayed on the display of all the other computers is switched in synchronization with the switching of the page, and the page information reflecting the editing on the own computer is displayed on the presenter's display. , When displayed on the display of all the other computers,
Further, when the presenter switches the page displayed on the display and the page information displayed on the display of all the other computers is switched in synchronization with the switching of the page, the information editing area of the own computer 3. The electronic conference system according to claim 2, further comprising means that is not affected by the page information. When the own computer is not a presenter, the presenter receives the same page information as the page displayed on the display, and the presenter displays the display in the shared information display area displayed on the display of the own computer. A means of editing the page information displayed in
The electronic conference system according to claim 2, further comprising: means for displaying the edited page information in synchronization with all the other computers.   When the own computer is not a presenter, the presenter receives the same page information as the page displayed on the display, and the presenter displays the display in the shared information display area displayed on the display of the own computer. When the page information displayed on the screen is edited, the page information displayed by the presenter is switched, and when the page information of the other computer is switched in synchronization with the page switching, 5. The electronic conference system according to claim 4, further comprising means for continuing the editing operation of the own computer and switching the shared information display area and the information editing area. When the other computer does not have the presenter's authority, the presenter's authority is given to the computer when an operation requiring the presenter's authority that affects the display state of all the computers such as a page switching operation is performed. Means,
6. The electronic conference system according to claim 2, further comprising means for abandoning the presenter authority when an operation with the presenter authority is not performed until a predetermined time elapses. In an electronic conference system in which a plurality of computers are connected via a network, and the same contents as those displayed on the display of one of the computers are displayed in synchronization with all the computers, the computers A screen display control method provided in
Determining whether the computer is a presenter;
Repeating the page switching when the computer is a presenter and repeating until the computer abandons the presentation right to notify all other computers of the switched page information;
When the computer is not a presenter, the presenter receives the same information as the information displayed on the display, and displays the shared information display area displayed on the display of the computer;
When the local computer is not a presenter, displaying any page information other than the page displayed by the presenter on the display of the local computer in the information editing area of the display of the local computer;
When the presenter displays a page being edited in the information editing area of the own computer on the display, the page information reflecting the editing result in the own computer is displayed on the display of the presenter, And displaying on all the computers in the display. A screen display control method comprising: When the own computer is not a presenter, the presenter receives the same page information as the page displayed on the display, and the presenter displays the page information in the shared information display area displayed on the display of the own computer. Editing the page information shown on the display;
The screen display control method according to claim 7, further comprising: displaying the edited page information in synchronization with all the other computers. When the own computer is not a presenter, the presenter receives the same page information as the page displayed on the display, and the presenter displays the page information in the shared information display area displayed on the display of the own computer. When the page information displayed on the display is being edited, the page information displayed by the presenter is switched, and the page information of another computer is switched in synchronization with the page switching. The process of continuing computer editing,
The screen display control method according to claim 8, further comprising a step of switching the shared information display area and the information editing area. When the other computer does not have the presenter's authority, the presenter's authority is given to the computer when an operation requiring the presenter's authority that affects the display state of all the computers such as a page switching operation is performed. Process,
The screen display according to claim 7, further comprising a step of abandoning the presenter authority when an operation with the presenter authority is not performed until a predetermined time elapses. Control method. In an electronic conference system in which a plurality of computers are connected via a network and the same contents as those displayed on the display of one of these computers are displayed in synchronization with all the computers, A screen display control program provided,
A determination module for determining whether or not the computer is a presenter;
A page switching module that performs page switching when the computer is a presenter and repeats until the computer abandons the presentation right to notify all other computers of the switched page information;
When the own computer is not a presenter, the presenter receives the same information as the information displayed on the display, and the shared information display module that displays the shared information display area displayed on the display of the own computer;
An information editing module for displaying any page information other than the page displayed by the presenter in the information editing area of the display of the own computer when the own computer is not a presenter,
When the presenter displays the page information being edited in the information editing area of the own computer on the display, the page information reflecting the editing result on the own computer is displayed on the presenter's display, An editing information distribution module for displaying on the display of all the other computers. When the own computer is not a presenter, the presenter receives the same page information as the page displayed on the display, and the presenter displays the page information in the shared information display area displayed on the display of the own computer. A page information editing module for editing page information displayed on the display;
The program according to claim 11, further comprising: a page synchronization module that displays the edited page information in synchronization with all other computers. When the own computer is not a presenter, the presenter receives the same page information as the page displayed on the display, and the presenter displays the page information in the shared information display area displayed on the display of the own computer. When the page information displayed on the display is being edited, the page information displayed by the presenter is switched, and the page information of another computer is switched in synchronization with the page switching. An editing module to continue editing the computer,
The program according to claim 12, further comprising: an area replacement module in which the shared information display area and the information editing area are interchanged. When the other computer does not have the presenter's authority, the presenter's authority is given to the computer when an operation requiring the presenter's authority that affects the display state of all the computers such as a page switching operation is performed. Presenter authorization module;
14. The presenter authority renunciation module which renounces the presenter authority when the operation with the presenter authority is not performed until a predetermined time elapses. Program.   A storage medium storing the program according to any one of claims 11 to 14 in a computer-readable manner.

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