Establish Second Equidistant Mark

What happens here

Rotate the framing square 90 degrees. Now, align the *other* arm of the square flush with the *same* straight edge of the plywood, with the previously unmarked arm extending perpendicularly across the material. Once again, measure and make a mark with your pencil at the *exact same measurement* (e.g., 8 inches) from the corner, but this time on the second arm of the square. You should now have two marks, each 8 inches from the corner, but along different edges of an imaginary 8x8 inch square originating from the corner.

Goal: Create a second accurate reference point on the adjacent side, equidistant from the corner.