Method PhysicalScreen():isPrimary() Foundation
Determines whether a screen is the primary screen.
:isPrimary() --> lIsPrimary
.T. (true) if the screen is the primary screen, .F. (false) if the screen is an auxilliary screen.
The method :isPrimary() determines whether a physical screen is the primary screen of the computer. The primary screen has a unique role within the screen arrangement in a multi-screen environment. See here for further information.
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