Execute the command after selecting objects to filter and select the external boundary lines of the selected objects. The selection set with openings can also be handled correctly.
The select boundary plug-in function can quickly select the external boundary lines of the selected objects to obtain the external contour lines of the selection set.
Select Outer Edges（Select Outer Edges）动画教程
Execute the command after selecting objects to filter and select the external boundary lines of the selected objects.
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