[solved] How to preview Onion skin frames?

Is onion skin the part where you see the frames that you have already drawn? if so, How do you make it so that you only see 2 frames at a time? The previous frame and the frame you are on.

The previous/next onion skin can be turned on/off separately in Display window (Ctrl+5 to bring it up).

And you can change the number of onion skins in Preference. Set the number to 1 if you only want to see one previous frame.