The drawing style of the editor's cursor during a selection drag.
capi
:left-bar
The drawing style of an editor-pane cursor during a selection drag.
The allowed values are :inverse, :outline, :underline, :left-bar and :caret.
:inverse
:outline
:underline
:caret
CAPI User Guide and Reference Manual (Macintosh version) - 3 Aug 2017