Patent ID: 7979799

Claim:
An image display apparatus for presentation connectable to a computer comprising: a candidate information obtaining unit configured to obtain selection candidate information relating to one or more selection candidates for a presentation subject file, the selection candidate information being generated by the computer; a selection screen display unit configured to generate and display a selection screen for selecting the presentation subject file based on the selection candidate information, the selection candidate information obtained by the candidate information obtaining unit; a presentation execution instruction unit configured to make the computer to execute the selected presentation subject file by sending selection results with the selection screen to the computer; and a drawing screen display unit configured to capture and display a computer drawing screen drawn by the computer; wherein the image display apparatus displays the selection screen without displaying the computer drawing screen when a connection with the computer is established, and displays the computer drawing screen when drawing by the computer executing the selected presentation subject file is started; the image display apparatus and the computer are connected by an image transmission channel and an information transmission channel separate from the image transmission channel, the image transmission channel being configured to transmit the computer drawing screen, and the information transmission channel being configured to transmit information other than the computer drawing screen; and the image display apparatus suppresses display of the computer drawing screen until start of drawing by the computer executing the selected presentation subject file, even if the computer drawing screen is supplied from the image transmission channel.