Newbie Push Pull Question - Shortcut to Go Back to 2D/"Flatten"

[alisw10]

I think it is useful to be able to do what you are asking, here are two solutions to your question.

Can I stop sketchup deleting faces after a push (pull)?

I do a lot of push pulling, usually starting with 2d faces. Sometimes i pull a face upward, then want to push it back downward to make it 2D (flat) again… Then sketchup deletes the original face and bounding edges. How can I ask it to stop doing that? Thanks