The screen size functions access or specify the height or width of the terminal. When you are using multiple frames, they apply to the selected frame (see section Frames).
(screen-height) => 50
(screen-width) => 80
If not-actual-size is non-nil
, then Emacs displays
lines lines of output, but does not change its value for the
actual height of the screen. (Knowing the correct actual size may be
necessary for correct cursor positioning.) Using a smaller height than
the terminal actually implements may be useful to reproduce behavior
observed on a smaller screen, or if the terminal malfunctions when using
its whole screen.
If lines is different from what it was previously, then the entire screen is cleared and redisplayed using the new size.
This function returns nil
.
set-screen-height
.
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