Vertical Size Control - IBM Personal Computer XT Manual To Operations

Vertical Size Control
Use this control (as described below) only if the
character size on your IBM Color Display is incorrect.
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Vertical Size
Control
1
Set the Power switch on the system unit (and
expansion unit, if attached) to Off.
2
Set the display's Power control to On.
3
Turn the Brightness and Contrast controls fully
clockwise.
4
Turn the Vertical Size control fully
counterclockwise. A black area appears across
the top and bottom of the screen.
Displays 3-21