How to resume quad draw after a save?

No.498323 ViewReplyOriginalReport
I've been trying to retopologize a model in maya for a long time, but it keeps crashing before I can get all the way thru. I save regularly, but when I open it back up, I can't figure out how to get back to resuming quad draw like I was before. The new quads don't snap to the verticies from last time. How do I fix this?