If individual edges and elements on the layer should be deleted, then this is done with the usual techniques and commands. Open line segments can be closed with special tools.
Sample 1: window construction
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: Click on the graphic below to start the video.
Deleting unused edges and closing boundary lines
Summary
•Not needed lines can be selected and deleted with the Select, Move, Scale tool 
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•Open line segments can be closed with the Line tool 
and the Polyline tool 
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•It's only possible to draw on visible layers.
To continue the lesson you can click here or use the navigation buttons on the top.