Library is the place where information/resources are stored. so that people can use resources/ information to resolve their issues. PrintXpand designer tool offers you such libraries like color library, font library, image effects and filters library, and clipart library. In these libraries, you can store the related information so that it can be used by your customer on the front end.
For example, if you add a collection of fonts to the font library, then customers can apply such fonts to the product.
These features will help your customers to customize the product in their way. It also gives customers more options to customize like they can add cliparts, colors, effects & filters, and multiple fonts to the product.
