Quite often when drawing there will be gaps an overlaps in what you create. We've designed Catchbook to make it as easy as possible to fix those quickly.
There are 2 approaches:
Here's a quick video I recorded showing the 2 methods:
Hint: Catchbook often gives the best results when you draw curves individually.
Hint: We often notice people drawing really quickly with Catchbook, typically you'll get better results if you are a little slower and more careful than you would be sketching on paper.