Yes, "C-g" is `keyboard-quit'. And if you make some damage by hitting keys on accident, "C-h l" (aka `view-lossage') will show you the last key presses, so you

Yes, "C-g" is `keyboard-quit'. And if you make some damage by hitting keys on accident, "C-h l" (aka `view-lossage') will show you the last key presses, so you can know what you've typed. "C-h k" (aka `describe-key') will tell you what command a key sequence runs. EDIT: Added command names.