You know how you use Ctrl-LMB to draw vertices in Edit Mode? I just noticed that you can use Ctrl-LMB to extrude selected points (which is what I guess you are doing when you are drawing vertices).
For example. select the top face of a cube and then Ctrl-LMB elsewhere. You just extruded the face! Click around to make more extrusions. It’s neat how it also angles the face based on the offset of the click.
John