I use this app via iPad 2018 with apple pencil.
I found a palm rejection problem, my drawing has lag when my palm on screen.
How I can fixed this?
Thanks, Nichan
Palm rejection problems
1. Reset SketchBook to default. [=] > Preferences > Factory Defaults (Reset 4 sections).
2. Disconnect and reconnect the Apple Pencil in SKETCHBOOK.
https://www.sketchbook.com/help/knowledge-base/stylus-troubleshooting/
David Lau