SET ALPHA MASK

Determines which plane(s) can be modified by ALPHA display operations.

SET ALPHA MASK numeric-expression

Description:

The numeric expression value specifies which display bit planes are modified by alpha display operations. This statement does not affect monochrome displays. This statement is equivalent to CONTROL CRT,18.

This statement is not supported by HTBasic. Use MERGE ALPHA or SEPARATE ALPHA.

See Also:

ALPHA HEIGHT, ALPHA PEN, CLEAR SCREEN, MERGE ALPHA, SEPARATE ALPHA, SET DISPLAY MASK