Smart Face
shortcut 4
edit mode
Smart Face simplies various common task around Edges.
Selection
in vert mode with 1-2 verts selected: smart face creation in vert mode 3+ verts selected: face creation from selection
in face mode with 1+ faces selected: create separate object, optionally go into focus mode based on operator proprties
Using Smart Face
Note
This is an old video and does not cover all the features described above.