draw-plus-minus

Arguments: outline

Returns the value of the draw-plus-minus property of outline. This property determines whether to draw the plus and minus symbols beside each item in the outline control's dialog. If drawn, a minus indicates that all of the immediate descendents of an item are displayed while a plus means that there are undisplayed descendents.

draw-plus-minus is a property of the outline and dropping-outline classes.

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Created 2015.5.21.