Measure and Mark the Decking Board

What happens here

Begin by selecting the composite decking board that will serve as the railing cap. Carry it to the work area, which appears to be a sawhorse or similar stable surface near the deck. Place the decking board on this surface. Use a speed square and a carpenter's pencil or construction marker to precisely mark the area on the decking board where a notch needs to be cut. This notch will allow the board to fit around the railing post. Measure carefully to ensure the mark aligns with the dimensions of the post.

Goal: Prepare the composite decking board for notching