Tooling holes, while not as relevant as they used to be, are still valuable to have and do not usually cost any extra to add. You can put 4 of them in the corners and they are 3.175mm in diameter (which is 1/8" which was a standard pin support size that most of the industry standardized on in the 80's)
You can add 4 tooling holes 1/8" in diameter to the 4 corners of the panel
Check Add Tooling Holes to automatically add 4 tooling holes.
