In the top left corner, you will find the select textile icon, where you can choose which textile collection you want to work with. You will also be able to select other textiles for the accessories, but the program does not support the use of multiple textiles on the sofa, as it is usually not aesthetically pleasing. Once you've selected a collection, it will appear in the design interface and you just need to click on the colour you like to apply it to the item.