| 摘要 |
<p>PURPOSE:To eliminate the fact that a system line comes to be an obstacle and to obtain an efficient displaying screen by executing the displaying only when the system line is necessary and preventing the displaying when it is not necessary. CONSTITUTION:First, while a system line is not displayed on the displaying screen of a CRT displaying device 100, the system line is set and a window screen 11 is formed. Next, when a command that the system line is to be displayed on a screen 11 is inputted, the screen 11 is displayed when the screen 11 is not displayed and a character is displayed in the screen. While the screen is displayed, an input character is displayed. In this condition, when a command that the character is to be deleted is inputted, a displaying character is deleted and next, the screen 11 is also deleted. Further, when a command that the screen 11 is to be cleared is inputted and the screen is displayed, the system line is cleared and the screen 11 is deleted. Thus, the efficient displaying is executed.</p> |
