I find myself using the drawing tools a lot, so it would be great if there were keybinds for each of them (Ruler, Marker, Circle, and Erase). Additionally, it would be nice if the radius for clicking on marks to erase was larger as it seems you need to have the cursor dot exactly on the lines which makes it somewhat annoying to click them at times, especially when deleting a lot of them. Having the ability to drag to select multiple could also be a nice way to more easily manage many marks as well.