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What is the overlay property of a graphic window?

April 26, 2017graphic overlay Property window

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What is the overlay property of a graphic window?

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The overlay property is a graphic window specific group which has been added to allow for dynamic graphic overlays. All graphics added to this group are draw on top of the current graphics and if objects in the overlay group are modified, transformed, highlighted then the screen repair is done directly from the save_under image and not by redrawing all entities in the effected area. This can be dramatically faster when there is a large amount of graphics being displayed and a lot of realtime modifications are required.