Mark Points and Install Nails

What happens here

Place the framing square along the horizontal line, aligning the 4-inch mark with the center point of the cross. Mark the endpoints of the 4-inch horizontal line. Repeat this process for the other side if necessary, ensuring the 4-inch segment is properly centered. Next, take a hammer and drive three nails into the wooden surface: one nail at the top end of the 8-inch vertical line, and two nails at the marked 4-inch horizontal endpoints on the left and right sides of the cross. The video refers to these as 'this point right here' for the bottom nail location, which is 4 inches down from the center, effectively extending the vertical axis.

Goal: Establish the anchor points for the string compass.