How to Keep a Straightedge from Slipping
A straight edge on a smooth surface…now, that can be a slippery problem. Just when you're about to draw your line or make your cut , the straight edge moves. Try this solution.
Instead of putting your fingers just on the straight edge put half on the straight edge and half on the surface.
One more thing that will help make your straight edge a little more slip resistant is to put some tape on the back right where you need it.
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