| 摘要 |
<p>An image display terminal includes an image display control unit, a display range setting unit, a display range sending unit and a graph expression receiving unit. The image display control unit displays a background image in a display screen. The display range setting unit sets display range data of a coordinate system to an image display region of the display screen. The display range sending unit sends the display range data to at least one other image display terminal which displays the background image displayed on the image display terminal. After the display range data is set to an image display region of the other image display terminal, the graph expression receiving unit receives, from the other image display terminal, graph expression data for a graph figure displayed on the image display region of the other image display terminal.</p> |
