Precision Drawing

So far, we have drawn full strokes one cell at a time. For finer control, hold Shift while drawing to work in half steps.

With Shift held, the cursor does not move to the next cell right away. Instead, the first key press draws half of the stroke in that direction. Press the same direction again to and move forward. This lets us extend lines, adjust corners, and make small changes more precisely.

Lets draw a ruler: