AT&T 6300 Programmer's Manual page 508

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WINDOW defines the "window"

transformation from xl,yl (upper left x,y

coordinates) to x2,y2 (lower right x,y

coordinates). The x and y coordinates may be

any single precision floating point number

and define the "World Coordinate Space" that

graphics will map into the physical coordinate

space, as defined by the VIEW statement.

Initially, RUN, or WINDOW with no

arguments, disables "Window"

transformation.

WINDOW inverts the "y" coordinate on the

subsequent graphics statement. This allows

the screen to be viewed in true cartesian

coordinates. The WINDOW SCREEN variant

does not invert the "y" coordinate.

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