Margins Overview
The Margins dialog box lists all available Margin resources in the left column.
Click a Margin in the left column to display its settings.
Name
A meaningful name of the resource
Offcut
Enter the Offcut distances in mm. These are the Top, Bottom, Left, Right margins for extra paper around each element.
Click the link icon if you want to set specific values for Left, Right, Top or Bottom. Margins are relative to the frame which initially corresponds with the trim box of your image.