To set or override Confine mode:
On: child objects cannot be moved outside their enclosing parent objects.
Off: child objects can be moved outside their enclosing parent objects.
To set or override Flex mode:
On: parent borders "stretch" when child objects are moved against them. The child object maintains the same distance from the side it moves against.
Off: parent borders remain fixed when child objects are moved against them.
Adjusting parent borders automatically
Moving an object outside its parent
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