Can someone help me with motion keyframes problem?

I created a drawing, peg and added motion to it. Looks just like in this video: https://learn.toonboom.com/modules/how-to-draw-and-animate/topic/how-to-add-a-colour-card

How do I now make changes to the single frames? Lets say I want to do frame by frame animation to the drawing thats moving. When I try to edit single frame (even after adding key exposure) it changes all frames. Any ideas? Thanks a lot.