tapping the screen with one finger trick is too inconsistent and finicky, it keeps picking color instead of constraint, and the floating keys at the bottom just plainly doesnt work. either draws ghost lines or sticks longer than i press it, or snaps to wrong axis. Oh and most annoyingly it keeps disappearing and going back to first page after every action.
drawing straight lines are a relatively common action, i dont get why is it hidden behind pages of tools and is that buggy. please give more consideration for touch only use cases, and add an always visible toggle for snapping to axis, or better, a proper ruler tool. Even making the floating toolbox actually float would be an improvement.