Step 4Bevel your corners
iImage Information

Go back to the mitre saw and adjust the angle to 45 degrees. These will be the corners of your canvas. You will turn the blade clockwise if you are feeding the wood from the right; counter clockwise if you are feeding from the left. Ideally, you will cut the right side of all the lengths first before rotating the blade and cutting all the left sides. Make sure the bevel on each of the four pieces is facing upwards with the shorter side closest to you.
You will have two pairs of the four lengths of wood. To ensure the pairs are the exact same length, clamp a wood block where one length of each pair ends, and use it as a mark for the second piece of the pair. This is a lot easier than measuring four times!