ScreenSize (variable) (
Determines the width and height in characters of the virtual screen within the CRT window.
const ScreenSize: TPoint = (X: 80; Y: 25);
The default screen size is 80 columns by 25 lines.
You can change the size of the virtual screen by assigning new values to the X and Y coordinates of ScreenSize before the CRT window is created.
The value given by ScreenSize.X multiplied by ScreenSize.Y must not exceed 65,520.