Display apparatus, control method for display apparatus and non-transitory computer-readable storage medium

1 . A display apparatus comprising:

a touch screen configured to receive user-initiated touch operations;

a display section; and

a control section configured to control the display section to display a display window on the touch screen, the display window including a first display area for displaying a bundle of reduced images of respective pages contained in a document file and a second display area for displaying a page image of part of the pages contained in the document file, wherein

the control section is further configured such that when an instruction to add a page is received by the touch screen while the touch screen is displaying the display window, the control section displays a page image of an additional page not previously contained within the document file, such that the page image is displayed in the second display area and such that the bundle of reduced images displayed in the first display area is augmented to include a reduced image of the page image of the additional page,

the control section is configured such that the instruction to add a page represents a selection of a blank page, a copy of the page image of the page contained in the document file, or an externally input captured image as the additional page,

the control section is configured such that when the touch screen receives a selection of the additional page with the drawing line drawn thereon as the additional page, and

the control section displays the additional page received by the touch screen in the second display area and displays the bundle of reduced images containing the reduced image of the page image of the additional page in the first display area.

2 . The display apparatus according to claim 1 , wherein

the control section is configured such that, when a copy of the page image of the page contained in the document file is selected as the additional page, the control section sets an aspect ratio of the additional page based on an aspect ratio of the page contained in the document file, and

when a captured image is selected as the additional page, the control section sets an aspect ratio of the additional page based on an aspect ratio of the externally input captured image.

3 . The display apparatus according to claim 1 , wherein

the control section is configured to draw a drawing line on the additional page according to a trajectory of a pointed position received by the touch screen,

and when the additional page is a blank page, draws the drawing line having transparency on the additional page,

and when the additional page is a captured image, draws the drawing line not having transparency on the additional page.

4 . The display apparatus according to claim 1 , wherein

the control section is configured to display the page image of the additional page anterior or posterior to the page selected by the operation received by the touch screen.

5 . The display apparatus according to claim 1 , wherein

the control section is configured such that when displaying the bundle of images containing the reduced image of the page image of the additional page in the first display area, the control section does not attach a page number to the reduced image of the page image of the additional page.

6 . The display apparatus according to claim 1 , wherein

the control section is configured to display a first operation image for receiving an operation to select the blank page, a second operation image for receiving an operation to select the copy of the page image of the page contained in the document file, and a third operation image for receiving an operation to select the externally input captured image, and determines which of the first operation image, the second operation image, and the third operation image is operated, and determines which of the blank page, the copy of the page image of the page contained in the document file, and the externally input captured image to add as the additional page, and

the first operation image, the second operation image, and the third operation image are arranged along a first virtual axis, rotated around a second virtual axis crossing the first virtual axis, and deformed to be viewed overhead from diagonally above the first operation image, the second operation image, and the third operation image.

7 . A display apparatus comprising:

a touch screen configured to receive user-initiated touch operations;

a display section; and

a control section configured to control the display section to display a display window on the touch screen, the display window including a first display area for displaying a bundle of reduced images of respective pages contained in a document file and a second display area for displaying a page image of part of the pages contained in the document file, wherein

the control section is further configured such that when an instruction to add a page is received by the touch screen while the touch screen is displaying the display window, the control section:

generates a reduced page image formed by reduction of a page image of an additional page not previously contained within the document file, such that the page image is displayed,

superimposes and displays the reduced page image on a page image of a page selected by the operation received by the touch screen in the second display area, and

displays the reduced page image of the additional page in the first display area, wherein

the control section is further configured such that the instruction to add a page represents a selection of a blank page, a copy of the page image of the page contained in the document file, or an externally input captured image as the additional page,

the control section is further configured such that when the touch screen receives a selection of the additional page with the drawing line drawn thereon as the additional page, and

the control section displays the additional page received by the touch screen in the second display area and displays the bundle of reduced images containing the reduced image of the page image of the additional page in the first display area.

8 . A control method for a display apparatus comprising:

controlling a display section to display a display window including a first display area for displaying a bundle of reduced images of respective pages contained in a document file and a second display area for displaying a page image of part of the pages contained in the document file;

when receiving an instruction to add a page while the display window is being displayed, displaying a page image of an additional page in the second display area; and

displaying a reduced image of the additional page in the bundle of reduced images in the first display area, wherein

it is further controlled such that the instruction to add a page represents a selection of a blank page, a copy of the page image of the page contained in the document file, or an externally input captured image as the additional page,

it is further controlled such that when the touch screen receives a selection of the additional page with the drawing line drawn thereon as the additional page, and

the additional page received by the touch screen is displayed in the second display area and the bundle of reduced images containing the reduced image of the page image of the additional page is displayed in the first display area.

9 . A non-transitory computer-readable storage medium storing a program for controlling a computer to execute:

a procedure of controlling a display section to display a display window including a first display area for displaying a bundle of reduced images of respective pages contained in a document file and a second display area for displaying a page image of part of the pages contained in the document file;

a procedure of, when receiving an instruction to add a page while the display window is being displayed, displaying a page image of an additional page in the second display area; and

a procedure of displaying a reduced image of the additional page in the bundle of reduced images in the first display area, wherein

it is further controlled such that the instruction to add a page represents a selection of a blank page, a copy of the page image of the page contained in the document file, or an externally input captured image as the additional page,

it is further controlled such that when the touch screen receives a selection of the additional page with the drawing line drawn thereon as the additional page, and

the additional page received by the touch screen is displayed in the second display area and the bundle of reduced images containing the reduced image of the page image of the additional page is displayed in the first display area.