Keeping your wrists vertical reduces muscle strain. This print works with the thin Apple trackpads like the A1535. Right and left handed people can use it. It has holes for the charging cord and power switch.

It's likely the holder will slide on your desk so I suggest some kind of anti-slip material like Duck Brand Hold-It Adhesive for Rugs. Easy to cut and stick to the bottom of the holder.

No printing support should be necessary.