You can create lines with the pencil, eraser and lighten/darken tool by holding Shift while drawing! Please note that as of v0.5, straight line making behavior is a little weird, and it will be changed in v0.6!
ooooo but i use a tablet for drawing lol
You can map Shift to one of your tablet's buttons, right?
no i have no buttons on my tablet
Hmm, we'll see what we can do then!
you can make it a tool also thanks