Idk I used it for my math homework cause I don't like killing trees lol. really ez 2 use just change size of brush in top corners and press space to swap from drawing and erasing :) and press 1 to change color and use a hex code. Enjoy (idk how you would lol) If you are doing Homework or something like that I suggest a mouse(if possible) and/or Fullscreen mode.
I made it :) I also am working on a highlight feature but like this was made in 10 mins so I will not 100% have that but yea :)