This keyword has meaning only on graphical systems such as Windows. It is used to change the default virtual screen size. Value is the desired number of rows and columns, separated by a comma.
For example, to set the initial virtual screen size to 30 rows by 80 columns, you would make the following entry:
The comma is required.
The size of your virtual screen is independent of the size of the application window or the underlying hardware. In other words, the virtual screen can be larger than the physical screen. You may set any screen size up to a maximum of 655 rows and 655 columns. If you do not specify a size, the default is 25 rows and 80 columns. You may also use the configuration variables SCRN_SIZE_COLS and SCRN_SIZE_ROWS to set this option.
The SIZE option sets only the initial screen size. After the application begins, the screen size can be changed with the DISPLAY SCREEN SIZE verb.
If the virtual screen is too large to be fully displayed on the physical screen, the user will have to scroll to view all of the rows and columns.