| 摘要 |
PROBLEM TO BE SOLVED: To display ruled lines in a desired direction by a desired ruled line type with a few key operation numbers by depressing three keys simultaneously at once so as to select the type of the desired ruled line and plotting the ruled line in a moving direction of a cursor. SOLUTION: An extension function key is one of control keys. Furthermore, a character key 'A' is one of character keys 2. Moreover, cursor keys 3 are four keys to move a cursor displayed on a screen in upper/lower/left/right directions. Then three of keys, a control key 1, a character key 2 and a cursor key 3 are depressed simultaneously to decide a type of a ruled line selected by the control key 1 and the character key 2 and the ruled line is plotted on the screen in the cursor moving direction. While two keys, a control key 1 and a character key 2 are depressed simultaneously to decide a type of a ruled line and the state is locked, two keys, a control key 1 and a cursor key 3 are depressed simultaneously to plot a ruled line whose type is locked in the moving direction of the cursor on the screen. |
