Hi, I have some ideas based on my experience to improve your program for a comfortable user experience.
My ideas:
1) Thickness for the arrow and arrowhead. Problem: In different situations, the size of the arrowhead remains very large and the line is thin and this does not change.
2) Color palette. Problem: there is no function to remove a color from the color palette. I have to constantly create new colors for different projects and I get confused which colors I created for this or that project because there are already so many of them.
3) Colors for stickers. Unfortunately a small selection of colors for stickers. The problem: when creating stickers for a project, I want to use colors that are appropriate to the project, but the colors are limited in the program and they do not correspond to the mood of the project. I think that it would be better to choose the colors yourself.
I look forward to your response and incorporating ideas into your program.

