Prepare
Crop marks plus registration targets at the sheet edges, so multi-colour and duplex jobs line up. Placed from the page boxes, clear of the bleed.
Registration marks at the centre of each side for the press or the eye.
One switch gives crop and registration together.
The page is enlarged only by the mark length and offset.
The defaults come from your file. Change a setting and the proof updates before you let go of the mouse.