JP2019016409A - Display device, display method and program - Google Patents

Abstract

To provide an operation display device which enables touch operation of a user to easily realize a variety of different operation when a material is displayed thereon.SOLUTION: A display device generates a page group file containing one or a plurality of pages from a file containing a plurality of pages, and displays a thumbnail of one page selected from the pages included in the page group file, and an identification mark showing that the file is the page group file superimposed thereon. When detecting operation to release superimposed display of the identification mark on the thumbnail, the display device displays a list of the thumbnails displayed in the page group file.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a display device and the like.

  In recent years, with an increase in size of a liquid crystal display device, for example, a device called a table display in which a liquid crystal display device is incorporated in a table has appeared. The table display can display various operations by being integrated with the touch panel.

  For example, when displaying materials such as PowerPoint on a table, a system has been proposed in which materials are imaged and operations such as movement, rotation, and page turning are realized by touch operations similar to conventional paper operations.

Specifically, there is known an invention in which image data having attribute information is grouped to generate an image group and thumbnail images are displayed in a list form on a display device (for example, see Patent Document 1).
There is also known an invention in which a plurality of document data is classified into groups, display image data of the document data classified into the same group is generated, and displayed so that the pages can be turned (for example, see Patent Document 2).

JP 2012-19364 A JP 2008-210182 A

  When there are multiple documents on the table display, there are requests to perform various operations such as "I want to display a list of the contents of a document", "I want to turn the pages one by one", "I want to move a document" is there.

  However, as a conventional operation method, for example, when a plurality of display images are displayed on a display device with a touch panel and the operator flicks the display image, the display image is moved. There is a problem that it is not possible to determine whether to perform a page turning operation or to perform a page turning operation, and the process cannot be specified.

  In addition, when performing processing such as movement of all the displayed images and list display, it is necessary to call up the operation menu once to operate and switch the processing mode, which requires troublesome operations for the operator. there were.

  In view of the above-described problems, the present invention aims at a display device that can easily realize various different operations by an operator's touch operation or the like when a document is displayed on the display device. Is to provide.

In view of the above-described problems, the display device of the present invention is
A display unit that displays one or more page images based on a file including a plurality of pages, and an identification display indicating that the file includes a plurality of pages;
When receiving a touch operation on the identification display, an operation mode in which the one page image is displayed on the display unit and the operation can be received, and a list of the plurality of page images displayed on the display unit as a list A control unit that switches between display modes;
It is characterized by providing.

The display method of the present invention includes:
A display step for displaying one or a plurality of page images based on a file including a plurality of pages, and an identification display indicating that the files include a plurality of pages;
A control step of switching between an operation mode capable of displaying the one page image and accepting an operation when a touch operation on the identification display is accepted, and a list display mode displaying a list of the plurality of page images; ,
It is characterized by including.

The program of the present invention
On the computer,
A display function for displaying one or a plurality of page images based on a file including a plurality of pages, and an identification display indicating that the files include a plurality of pages;
A control function for switching between an operation mode in which the one page image is displayed and an operation can be accepted when a touch operation on the identification display is received, and a list display mode in which the plurality of page images are displayed in a list; ,
It is characterized by realizing.

  According to the present invention, from a page included in a page group file, a thumbnail of one page and an identification display indicating that it is a page group file are superimposed and displayed. When an operation for canceling the superimposed display with the thumbnail is detected for the identification display, the thumbnails of the files displayed in the page group file are displayed in a list. Thus, the operator can easily identify that the displayed thumbnail includes a plurality of pages by the identification display. Furthermore, by switching between the display of the page group file and the list display, it is possible to switch the confirmation and operation of the page as necessary.

  Further, from the pages included in the page group file, a thumbnail of one page and an identification display indicating that the page group file is displayed are superimposed. If a flick operation is detected on a thumbnail displayed by the page group file display means after an operation for selecting an identification display is detected, the thumbnail may be switched to a thumbnail of a different page and displayed. it can. As a result, the thumbnails displayed in the page group file can be switched and displayed, and the contents of a page that is not currently displayed can be easily confirmed by an intuitive operation.

It is a figure for demonstrating the whole in 1st Embodiment. It is a figure for demonstrating the function structure of the table display in 1st Embodiment. It is a figure for demonstrating the clip file in 1st Embodiment. It is an operation | movement flow for demonstrating the basic process in 1st Embodiment. It is a figure for demonstrating the operation example in the material operation mode in 1st Embodiment. It is an operation | movement flow for demonstrating the flow of the process in 1st Embodiment. It is a figure for demonstrating the operation example in 1st Embodiment. It is a figure for demonstrating the operation example in 1st Embodiment. It is a figure for demonstrating the operation example in 1st Embodiment. It is a figure for demonstrating the operation example in 1st Embodiment. It is an operation | movement flow for demonstrating the flow of the process in 2nd Embodiment. It is a figure for demonstrating the operation example in 2nd Embodiment. It is an operation | movement flow for demonstrating the flow of the process in 3rd Embodiment. It is a figure for demonstrating the operation example in 3rd Embodiment. It is an operation | movement flow for demonstrating the flow of the process in 4th Embodiment. It is a figure for demonstrating the operation example in 4th Embodiment.

  The best mode for carrying out the present invention will be described below with reference to the drawings. For convenience of explanation, the embodiment will be described as an example, but it is needless to say that any device can be applied as long as the device can perform a display operation.

[1. First Embodiment]
[1.1 Overall configuration]
FIG. 1 is a diagram showing an appearance of a large display device (table display 10) that can be operated by a touch panel to which the display operation device of the present invention is applied.

  The table display 10 has a table shape, and the table portion is constituted by a display device (for example, a large liquid crystal display device). Further, the display device is configured integrally with the touch panel and can be operated by the operator.

  Here, the table display 10 can be operated by a plurality of operators from the size and shape of the display unit. For example, each operator can operate from four directions, so that it can be used for various meetings and negotiations, for example.

[1.1 Functional configuration]
Next, the functional configuration of the table display 10 will be described with reference to FIG. As shown in FIG. 2, the table display 10 includes a control unit 110, a display unit 120, an input detection unit 130, an image processing unit 140, a communication unit 150, and a storage unit 160. .

  The control unit 110 is a functional unit for controlling the entire table display 10. The control unit 110 implements various functions by reading and executing various programs stored in the storage unit 160, and is configured by, for example, a CPU (Central Process Unit).

  The display unit 120 is a functional unit for displaying various information. For example, a liquid crystal display (LCD) or an organic EL display is used.

  The input detection unit 130 is a functional unit that can detect an input from the operator. In the present embodiment, it is formed as a touch panel integrally with the display unit 120. The input detection unit 130 can detect various operations such as tap, hold, slide, flick, and hold from the operator. In addition, it is possible to detect a plurality of inputs from the operator. For example, it may be 5 points simultaneously or 10 points simultaneously.

  Further, when the detection range is within the predetermined range and a plurality of detection points are detected, it is possible to detect that the predetermined range is selected.

  The image processing unit 140 is a functional unit for developing and displaying an image read from a file or the like. Also, thumbnail images are generated from existing files and pages.

  The communication unit 150 is a network interface unit for connecting to an external network of the Internet or other devices. For example, it is configured by NIC or the like.

  The storage unit 160 is a functional unit that stores various programs necessary for the operation of the table display 10 and various data. The storage unit 160 includes, for example, a semiconductor memory, an HDD (Hard Disk Drive), or the like.

  In addition, the storage unit 160 stores a file 162 in which various data are stored, a clip file 164 generated from the file, and a thumbnail image 166 generated by the image processing unit 140.

  Here, the clip file is a page group file in which one or a plurality of pages included in the file are collected. FIG. 3 is a diagram for explaining a clip file to be displayed (operated) according to the present embodiment. The left side shows each file 162.

  For example, a presentation format data file, an image file, and a spreadsheet data file are stored. The clip file on the right is a collection of data such as slides, images, and sheets contained in each file for each page.

  Thus, the clip file is a page group file in which pages of various data are collected. The pages to be collected are in various formats such as a text file, a spreadsheet file, a presentation file, an image file, and an electronic text file (PDF or XML).

  In FIG. 3, pages such as “Slide 1”, “Image.jpg”, “Sheet 2”,... Note that, as a clip file, data may be extracted directly from the file and collected, or link information for each file may be managed.

  This clip page is data to be operated by the operator. For example, a switching operation from the operator can perform an operation of switching display between page 1, page 2... And inserting / deleting some pages.

  In FIG. 3, pages are collected from a plurality of files. For example, a part or all of a single file may be a clip file.

  In this way, the operator can operate regardless of the type of page (type of application to be used, electronic text format, image format) stored for each clip page.

[1.3 Basic operation]
Next, the basic operation will be described. First, processing for designating and reading a clip file will be described.

  As shown in FIG. 4, first, a clip file is read (step S100). When a plurality of pages are not included in the clip file (step S102; No), a thumbnail image of the page is generated (step S110), and the thumbnail image is displayed (step S112).

  On the other hand, when there are a plurality of pages in the read file (step S102; Yes), a first thumbnail image is generated (step S104). Then, the clip page image is displayed (step S106), and the clip display for identifying and displaying the clip page is performed (step S108). Here, the thumbnail of the page and the identification display are displayed in a superimposed manner.

  Even when there are a plurality of read files and a plurality of pages are included, the same processing is executed.

  After the clip page image or thumbnail image is displayed, the document operation mode is entered (S114).

  The “material operation mode” is a basic operation mode. For example, a page can be added to, inserted from, or deleted from a material (a clip file in the present embodiment) from a file. It is also possible to move a clip file by selecting and dragging a page file, to enlarge / reduce the display by pinch-in / pinch-out, or to rotate the clip file.

  FIG. 5 is a screen display example (display screen W100) in the material operation mode. A clip file M102 is displayed, and a clip display T102 is displayed at the upper left of the display of the clip file M102. Thereby, the operator can visually recognize that the displayed file is a clip file.

  Further, the clip file M102 was originally displayed at the position of M104. The clip file is touched by the operator and dragged in the P1 direction so that it is displayed at the current position.

  As described above, in the material operation mode, the display position of the clip file can be moved by the operation of the operator.

[1.4 Process flow]
Subsequently, the flow of processing in the present embodiment will be described with reference to FIG. In the first embodiment, an embodiment for displaying a list of page thumbnails from a clip file will be described.

  First, a flick of the clip position is detected (step S152; Yes). In the present embodiment, a flick in the upward direction (outward direction of the clip file) is detected from the position of the clip.

  Subsequently, the page is read from the clip file (step S154), and the image processing unit 140 creates a page thumbnail (step S156). The page thumbnail is a thumbnail image for each page included in the clip file. In addition, as a timing for generating thumbnail images of pages included in the clip file, all thumbnail images may be generated, or thumbnail images are generated for each predetermined range (for example, a range displayed on the screen). It is also good to do.

  Subsequently, the clip is displayed outside the page (step S158). For example, in order not to overlap the clip file (or the thumbnail of the page included in the clip file), the page thumbnail is displayed outside the area where the thumbnail is displayed.

  Then, a list of page thumbnails is displayed (step S160), and a transition is made to the material list display mode (step S162).

  Here, the document list display mode is a mode for listing thumbnails (images) of pages included in a clip file. As a result, the operator can check what is contained in the entire clip file.

  At this time, image processing can be performed for each page. Specifically, you can tap thumbnails to pinch in (pinch out) to zoom in (zoom out), drag to change page order, or swipe and hold to delete pages. Various operations are possible.

  When a tap of a clip is detected in the document list display mode (step S164; Yes), the page thumbnail list display is changed to a clip file display (step S166). And it changes to material operation mode (step S168).

[1.5 Example of operation]
Subsequently, an operation example in the present embodiment will be described with reference to the drawings. FIG. 7 shows a state where the clip display T152 is selected by the operator.

  In this operation example, for example, when image data (for example, PowerPoint) of 6 pages of presentation data is captured, it is recognized as one related image based on the page number information added to the presentation data. When the 6-page presentation data is converted into a display image and then displayed on the display device, clip processing is performed as one group.

  Also, even in different file formats such as presentation data, spreadsheet data, or text data, the display image pages required from the different files are extracted and stacked while being displayed on the operation display device (table display 10). By executing clip processing (for example, double-clicking on a clip position with two fingers), it is possible to extract (or copy) required pages from different files and group them to create one display image. .

  In this manner, a clip file that has been clipped as one group displays a clip image indicating that it is a clip file at the top of the display image.

  In addition, the clip file is moved and dragged and dropped by the user, and the clip file is moved, the finger is pinched in or out, and the display image is enlarged / removed. Reduction is performed.

  Initially, the clip display T152 is displayed superimposed on the clip file M152. At this time, the clip file (clip file M152) can be moved, rotated, and copied by the operator by operating the clip file.

  Then, when the operator swipes the display image (clip display T152) of the clip file as it is in the direction P2 as shown in FIG. 8, the clip display T154 also follows and moves. When the operator's swipe is finished outside the clip file M152 (the touch state is released), a page thumbnail is displayed in the region R152 as shown in FIG.

  At this time, the clip display T156 is displayed outside the region R152. As described above, the clip images moved by the user are displayed in the vicinity of the display images displayed as a list, so that the grouped display images can be recognized. Further, when the clip display T156 is touched by the operator, the clip file display is resumed as shown in FIG.

  In addition, the displayed images displayed in a list can be moved, copied, rotated, etc. in the same way as display images that have not been clipped so far, and the user flicks the clip images and displays the list. When the image is overlaid on any of the displayed images or when a clip image is double-clicked, the grouped list display image shifts to the display of FIG.

  As a method for displaying the page thumbnail, for example, as shown in FIG. 10A, the page thumbnail is displayed so as to be included in a predetermined area by enlarging and reducing the page thumbnail. Also, as shown in FIG. 10B, a slide bar may be provided, or page switching may be performed as shown in FIG. These displays may be arbitrarily switched by the user on the setting screen or the like.

[2. Second Embodiment]
Next, the second embodiment will be described. The second embodiment is an embodiment of a page turning mode in which pages can be switched and displayed.

[2.1 Processing example]
The processing flow of the second embodiment will be described with reference to FIG. First, when a tap at a clip position is detected (step S202; Yes), a page is read from a clip file (step S204).

  Subsequently, an identification display is made that the clip file page can be displayed. Specifically, the clip is first changed to a paper weight display (step S206), and an identification display capable of turning pages is performed (step S208).

  Subsequently, a page turning operation is detected (step S210). For example, the operation of turning the page is detected by swiping the displayed page from right to left (left direction). In this case, a thumbnail image of the next page is generated (step S212), and a thumbnail image of the next page is displayed (step S214).

  The operations from step S210 to step S214 are repeatedly executed as a page turning operation mode until the paper weight is tapped (step S246; No). Note that the page turning operation may be, for example, an operation of tapping a page turnable identification display. Alternatively, the displayed page may be detected as an operation of turning the page in the reverse direction by swiping from left to right (right direction). In this case, a thumbnail image of the previous page is generated (if it remains as a cache image) and displayed.

  If a paper weight display tap is detected (step S216; Yes), the display is changed from the paper weight display to the clip display (step S218). Then, the page turnable identification display is stopped (step S220), and the material operation mode is executed again (step S222).

[2.2 Example of operation]
Next, an operation example in the present embodiment will be described with reference to FIG. In FIG. 12A, a clip display T202 is displayed in the clip file M202. When this clip display T202 is tapped, the clip display is changed to the paper weight display C204 as shown in FIG. In the lower right of the clip file M202, the state changes to the page turnable identification display C206. By such display change, the operator can recognize that the page can be turned.

  If the operator performs a flick operation in the P3 direction (left direction) as shown in FIG. 12C in this state, the pages can be switched. At this time, the paper weight display C204 is tapped to shift to the material operation mode.

[3. Third Embodiment]
Next, a third embodiment will be described with reference to FIG.

[3.1 Process flow]
First, hold of the displayed clip position is detected (step S302; Yes). If a flick is detected on the clip file while the hold of the clip position is detected (step S304; Yes), a thumbnail image of the next page is generated (step S306). Then, the generated thumbnail image of the next page is displayed (step S308).

  If the hold of the clip position is maintained (step S304; No → Step S310; No, Step S308 → Step S310; No), the above-described process is executed again (Step S310; No → Step S304).

  On the other hand, when the hold of the clip position is released (step S310; Yes), the clip file display state is restored (step S312), and a transition to the material operation mode is made (step S314).

[3.2 Example of operation]
Next, an operation example in the present embodiment will be described with reference to FIG. In FIG. 14A, a clip display T302 is displayed in the clip file M302. When the clip display T302 is held, the clip display T304 is displayed on the clip file M302 as shown in FIG. Also, the lower right corner of the clip file M302 changes to a page turnable identification display C302. Thus, the operator can recognize that the page can be turned.

  In this state, when the operator performs a flick operation in the P4 direction (left direction) as shown in FIG. 14C, the pages can be switched. At this time, when the hold state of the clip display T302 is released, the document operation mode is entered.

  In this embodiment, for example, in FIG. 14B, the display form is changed to leave the mode change to the operator, but the display change is not necessarily required. That is, it suffices to perform page turning while the clip display T304 is being held (selected state).

[4. Fourth Embodiment]
Subsequently, a fourth embodiment will be described.

[4.1 Process flow]
The process flow of the fourth embodiment will be described with reference to FIG. First, it is detected whether or not a predetermined range on the clip file is held (step S402). Here, whether or not the predetermined range is held is calculated by, for example, extracting the range including the detection points of multi-touch to determine the held region. Then, it is determined whether or not the calculated area is a predetermined size or more.

  When a flick is detected on the clip file while being held within this predetermined range (step S404; Yes), a thumbnail image of the next page is generated and displayed (step S406 → S408).

  When the hold of the predetermined range on the clip file is released (step S410; Yes), the clip file display state is restored (step S412), and the operation transitions to the material operation mode (step S412).

[4.2 Example of operation]
Next, an operation example in the present embodiment will be described with reference to FIG. In FIG. 16A, a predetermined range R402 is selected (held) by the operator on the clip file M402.

  When the operator performs a flick operation in the P5 direction (left direction) as shown in FIG. 16B in a state where the predetermined range R402 is selected (held) by the operator, the page can be switched. It becomes possible. At this time, when the hold state of the predetermined range R402 is released, the document operation mode is changed.

[5. effect]
According to the above-described embodiment, the input image data and document data (page) are expanded and displayed on the display image data (thumbnail). When a plurality of pages are included, clip processing is performed in the same manner as paper material, and association is made as a single display image, which facilitates operations such as moving and copying the display image. Can be improved.

[6. Modified example]
The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the design and the like within the scope of the present invention are also within the scope of the claims. include.

  In addition, the program that operates in each device in the embodiment is a program (a program that causes a computer to function) that controls the CPU and the like so as to realize the functions of the above-described embodiments. Information handled by these devices is temporarily stored in a temporary storage device (for example, RAM) at the time of processing, then stored in various ROM or HDD storage devices, and read and corrected by the CPU as necessary. • Writing is performed.

  Here, as a recording medium for storing the program, a semiconductor medium (for example, ROM, a non-volatile memory card, etc.), an optical recording medium / a magneto-optical recording medium (for example, a DVD (Digital Versatile Disc), MO (Magneto Optical), etc. Disc), MD (Mini Disc), CD (Compact Disc), BD, etc.), magnetic recording medium (eg, magnetic tape, flexible disk, etc.), etc. In addition, by executing the loaded program, not only the functions of the above-described embodiment are realized, but also based on the instructions of the program, the processing is performed in cooperation with the operating system or other application programs. The functions of the invention may be realized.

  In addition, when distributing to the market, the program can be stored and distributed in a portable recording medium, or transferred to a server computer connected via a network such as the Internet. In this case, of course, the storage device of the server computer is also included in the present invention.

  In addition, a part or all of each device in the above-described embodiments may be realized as an LSI (Large Scale Integration) that is typically an integrated circuit. Each functional block of each device may be individually chipped, or a part or all of them may be integrated into a chip. The method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, it is of course possible to use an integrated circuit based on this technology.

In addition, the operation display device of the above-described embodiment is
A page group file generating means for generating a page group file including one or a plurality of pages from a file including a plurality of pages;
A page group file display means for superimposing and displaying a thumbnail of one page and an identification display indicating that it is a page group file from the pages included in the page group file;
About the identification display, an operation detecting means for detecting an operation for canceling the superimposed display with the thumbnail;
A list display means for displaying a list of thumbnails of the files displayed in the page group file when the operation detecting means detects an operation to cancel the superimposed display with the thumbnail;
It is good also as providing.

In addition, the operation display device of the above-described embodiment is
A page group file generating means for generating a page group file including one or a plurality of pages from a file including a plurality of pages;
A page group file display means for superimposing and displaying a thumbnail of one page and an identification display indicating that it is a page group file from the pages included in the page group file;
Operation detecting means for detecting an operation for selecting the identification display;
When a flick operation is detected on a thumbnail displayed by the page group file display means after an operation for selecting the identification display is detected, switching to display the thumbnail by switching to a thumbnail of a different page Display means;
It is characterized by providing.

The program of the above-described embodiment is
On the computer,
A page group file generation function for generating a page group file including one or a plurality of pages from a file including a plurality of pages;
From a page included in the page group file, a page group file display function for displaying a thumbnail of one page and an identification display indicating that the page group file is superimposed,
About the identification display, an operation detection function for detecting an operation to cancel the superimposed display with the thumbnail;
A list display function for displaying a list of thumbnails of files displayed in the page group file when an operation for canceling the superimposed display with the thumbnail is detected by the operation detection function;
It is good also as realizing.

The program of the above-described embodiment is
On the computer,
A page group file generation function for generating a page group file including one or a plurality of pages from a file including a plurality of pages;
From a page included in the page group file, a page group file display function for displaying a thumbnail of one page and an identification display indicating that the page group file is superimposed,
An operation detection function for detecting an operation for selecting the identification display;
If a flick operation is detected on a thumbnail displayed by the page group file display function after an operation for selecting the identification display is detected, switching to display the thumbnail by switching to a thumbnail of a different page Display function,
It is good also as realizing.

In addition, the display device of the above-described embodiment is
Storage means for storing a page group file including one or more pages;
List display means for displaying a list of display images of pages included in the page group file, and displaying an identification display indicating that the displayed display image is a page group file;
Operation detecting means for detecting a touch operation on the identification display;
When a touch operation on the identification display is detected by the operation detection means, a display image of one page is displayed instead of the display image displayed in the list, and the identification image is displayed on the display image. Display means for superimposing the display;
It is good also as providing.

In this case,
Image processing means for performing image processing on the page;
The image processing means performs image processing for each page when a list of display images is displayed by the list display means, and is included in the file when a page group file is displayed by the display means. When image processing is performed on the entire page and thumbnails of files are displayed as a list by the list display unit, image processing may be performed for each page.

In this case,
The list display means may display the identification display near the outside of the list-displayed display image.

In this case,
The list display means includes:
Displaying the display image and the identification display in a superimposed manner;
For the identification display, an operation to cancel the superimposed display with the display image is detected,
When an operation to cancel the superimposed display with the display image is detected, a list of page thumbnails is displayed as the display image of the file displayed in the page group file.
This may be a feature.

In this case,
The display means includes
When it is detected by the operation detecting means that the identification display is superimposed on any of the display images displayed in the list after the flick operation to the identification display is detected, or the identification display is doubled. When a click operation is detected, the display image displayed in the list may be displayed by superimposing the display image on one page and the identification display.

The display method of the above-described embodiment is
Storing a page group file including one or more pages;
A list display step of displaying a list of display images of pages included in the page group file, and displaying an identification display indicating that the displayed display image is a page group file;
An operation detecting step for detecting a touch operation on the identification display;
When a touch operation on the identification display is detected by the operation detection step, a display image of one page is displayed instead of the display image displayed in the list, and the identification image is displayed on the display image. A display step for superimposing and displaying the display;
May be included.

The program of the above-described embodiment is
On the computer,
A storage function for storing a page group file including one or more pages;
A list display function for displaying a list of display images of pages included in the page group file, and displaying an identification display indicating that the displayed display image is a page group file;
An operation detection function for detecting a touch operation on the identification display;
When a touch operation on the identification display is detected by the operation detection function, a display image of one page is displayed instead of the display image displayed in the list, and the identification image is displayed on the display image. A display function that superimposes the display;
It is good also as realizing.

DESCRIPTION OF SYMBOLS 10 Table display 110 Control part 120 Display part 130 Input detection part 140 Image processing part 150 Communication part 160 Storage part 162 File 164 Clip file 166 Thumbnail image

Claims (5)

A display unit that displays one or more page images based on a file including a plurality of pages, and an identification display indicating that the file includes a plurality of pages;
When receiving a touch operation on the identification display, an operation mode in which the one page image is displayed on the display unit and the operation can be received, and a list of the plurality of page images displayed on the display unit as a list A control unit that switches between display modes;
A display device comprising:   The operation mode can accept any one of an operation of adding a page to the file or deleting a page, moving, enlarging, reducing, or rotating the page image. The display device according to 1.   When the control unit receives a touch operation to the identification display in a state where the plurality of page images are displayed as a list on the display unit, the control unit displays one page image among the page images displayed in the list. The display device according to claim 1, wherein the display device is a display device. A display step for displaying one or a plurality of page images based on a file including a plurality of pages, and an identification display indicating that the files include a plurality of pages;
A control step of switching between an operation mode capable of displaying the one page image and accepting an operation when a touch operation on the identification display is accepted, and a list display mode displaying a list of the plurality of page images; ,
A display method comprising: On the computer,
A display function for displaying one or a plurality of page images based on a file including a plurality of pages, and an identification display indicating that the files include a plurality of pages;
A control function for switching between an operation mode in which the one page image is displayed and an operation can be accepted when a touch operation on the identification display is received, and a list display mode in which the plurality of page images are displayed in a list; ,
A program characterized by realizing.

Images