Find Boundary Edges
Command
Find Boundary Edges
Shortcut
-
Button
Right of Command Bar 
Select the boundary Edges of an open area on a selected Sheet.
Basic Usage
- Select a Sheet you want to find boundary Edges.
- Click the button on the Right of Command Bar.
- Edges of the Sheet opening are selected.
💡
Unconnected Edges are one of the causes of not being Solid as expected. You can find unconnected Edges with this command.