By activating this Add-On, you'll be able to get a single print file instead of receiving a print file for each print area of your product.
You can configure how to merge in single file all print areas in your product and define the format and quality of the print file.
How to configure the single print file
Once you activate the add-on, go to Customizable Products and click on the product for which you wish to get a single print file.
Go to the step Printing Method and Setttings > Output
Check Get a single print file for all print areas/sides to open the configuration options of the single print file.
You'll be able to set file dimensions and margins, layout (number of columns and rows) and the position of the print areas. The print file will be like a grid where each cell is a print area of the product.