Add onion skinning. Improve UI as a whole, current one sucks

[Chris375389260xu2]

Trying to use the lightsaber add-on and I want to have it follow my reference with no jitter, could really use onion skinning. Also, user interface is garbage; I completed my video in Premiere Pro and transitioned to After Effects to add the lightsaber effect and the difference is jarring. 

[abuse removed by moderator]