I'm looking at a face that has around 50 cavities in it:
I'm making a sketch on that face, and I'd like to select all of the edges of the cavity, so I could do Offset Entities off of them.
I know how to select them one-by-one, but there are so many of them! I want to select them all automatically in some way to save time.
I tried various kinds of rectangle and lasso selection, but it looks like these tools are made for selecting entities inside the sketch, not outside of it.
How can I select all these cavities automatically?