Valerie sent me the link to your editor. Very impressive. 

I have a question though. Suppose I wanted to pick a certain sign, but I needed to modify the facial expression or body movements for that sign. How would I do so? I saw how to pick a different variant of a sign. I didn't see how I could take a specific sign already selected, and modify that sign to add facial expressions, body movements, or body shifts that may be necessary.