Last fall I made several large display easels
I don’t have pictures, but I’ll tell you that I clamped the left and right pieces together, drew a slanted line, and used my jigsaw to cut the angle. I then held the three pieces together to draw the line to drill my holes. You can see from the lines that you don’t drill exactly “straight” through the boards. (I ripped some 1x’s, so my small boards are about 3/4 x 3/4) You can get these kinds of small boards in the lumber dept at Home Depot.
From the back—you can see that I’ve added the d-rings so that my chalkboards will hang either horizontally or vertically. Generally it only takes 3 rings, I make the one on the top right swing either way…. but this door had a joint right there, and I couldn’t screw the d-ring into the crack.
The easels are pretty easy to make, but painting them is a little time consuming.