Close a position
When you want out, press CLOSE on its row in your positions. The desk works out the best way out that can happen right now and shows you what you will get before you sign.

YOU RECEIVE is what the close should pay. AT LEAST is the least it can pay before it refuses. The button says what you end with, like CLOSE · RECEIVE USDC.
Sell or exercise
The desk either sells your option to the best bids or exercises it, whichever pays more, and the money lands in your trading account. You do not need cash or tokens on hand to exercise. Calls, puts and exercise explains how. On an exercise, RECEIVE picks whether you end in USDC or the token.
When nothing can fill
If there is no bid and no way to exercise, the dialog says so and offers no button.
Close a short
CLOSE on a SELL row buys it back instead. See Close a short.