Create a new customisation or select a customisation from your library which you wish to use. Please see our video on how to create a new customisation here.
Once the design has been added, click 'Add Customisation' to add this same design in another position on your garment.
This will open your customisation library. Locate the design you wish to use and click the 'Add Customisation' button circled below.
Select the second position you would like the customisation to placed.
Now the same design will appear on the garment preview in two different positions.
If you require your customisation to be a different size in two different positions, you'll need to create two separate customisations.