This form is opened when you choose Add Map from the right-click context menu on the either the Varnishing page or the Foiling page of the 3D Wizard.
Add Mask Layer
Mask Image
Press the edit button 
to choose an image file.
Varnish / Foil Material
From the pulldown list choose the required Varnish / Foil Master Tool Setting. You can also add the chosen one to your favourites 
or make a local edit 
to the settings.
Scaling
Choose the required scaling option:
- Automatic
- Fit Width
- Fit Height
- Stretch