Resize WINDOW vertically by DELTA lines.
WINDOW can be an arbitrary window and defaults to the selected
one. An attempt to resize the root window of a frame will raise
an error though.
DELTA a positive number means WINDOW shall be enlarged by DELTA
lines. DELTA negative means WINDOW shall be shrunk by -DELTA
lines.
Optional argument HORIZONTAL non-nil means resize WINDOW
horizontally by DELTA columns. In this case a positive DELTA
means enlarge WINDOW by DELTA columns. DELTA negative means
WINDOW shall be shrunk by -DELTA columns.
Optional argument IGNORE non-nil means ignore restrictions
imposed by fixed size windows, `window-min-height' or
`window-min-width' settings. If IGNORE is a window, ignore
restrictions for that window only. If IGNORE equals `safe',
live windows may get as small as `window-safe-min-height' lines
and `window-safe-min-width' columns. Any other non-nil value
means ignore all of the above restrictions for all windows.
This function resizes other windows proportionally and never
deletes any windows. If you want to move only the low (right)
edge of WINDOW consider using `adjust-window-trailing-edge'
instead.