Fix buts please

Dont get me wrong. I love this app. I use it for 90% of my drawings. My issue is, recently, I have notices really bad lag that creates issues with drawing, and every once in a while, the whole app will like stop to reload and I loose the last 20 strokes or something (meaning I cant use the back button)
I can probably work around this but these are issues to look into please.
Also, we should be able to use more than 3 layers on screen resolution preset. 3 is not enough

Ytsejam58 about Sketchbook®, v3.6.1