elisp: Frame Geometry

 
 28.3 Frame Geometry
 ===================
 
 The geometry of a frame depends on the toolkit that was used to build
 this instance of Emacs and the terminal that displays the frame.  This
 chapter describes these dependencies and some of the functions to deal
 with them.  Note that the FRAME argument of all of these functions has
 to specify a live frame (SeeDeleting Frames).  If omitted or ‘nil’,
 it specifies the selected frame (SeeInput Focus).
 

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