1j01
commented
4 years ago If you have a number pad, use numpad +/- to control the eraser size (and other tools).
Otherwise, you could set up a key mapping with something like AutoHotKey, or enter eraser_size = 1 in the F12 console (not guaranteed to work in future versions).
TheAwesome98-Real
In regular paint, there is no transparency, so I pencil white, but we need 1px erasers (EDIT: in JSPaint). I need to draw 1px transparency areas, but I have to resize the canvas and go out of my way to do it.