GTCO Summagraphics ADB Interface - Users Guide - Manual (Page 22)

Summagraphics 22
along the Y axis. These resolutions do not correspond to the maximum screen
dimensions, but only to the active area of the screen – the desktop.
 For tablet and screen images to have the same relative appearance, the viewport
must have the same aspect ratio as the screen active area. Aspect ratio is the
relationship of height to width or Y axis to X axis. If the ratio is different, the screen
images are distorted. For example:
Scenario 1: You want the standard Macintosh screen (72 pixels per inch) mapped one-
to-one with the tablet viewport.
Use the setup defaults: X PixScale = 72, Y PixScale = 72.
Scenario 2: The X and Y screen resolutions are 68 pixels per inch. You want a one-to-
one mapping of the screen and tablet.
Use X PixScale = 68, Y PixScale = 68