Show Free Edges

PowerPack | Mesh Tools | Free Edges

The Free Edges analysis examines the model for any edges on which other transitional surfaces are not dependent.

After analysis, this function places a bold red line on the free edges, shown in the illustration below.

The red outline determining the free edges can be removed using Edit > Undo, or the keyboard shortcut CTRL Z.

Highlighting the free edge analyzed by the Show Free Edges tool