Returns (or sets with setf) whether grid-widget, when it has the keyboard focus, will draw a rectangle around the cell that has the keyboard focus to show that that cell has the focus. The default is t, but it may be desirable to turn this property off if a grid-widget is being used for display only rather than for keyboard input, or if no cell-specific keyboard event-handling code is supplied for a grid-widget.
show-focus is a property of the
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