The phrase "to create a collage" means to make an artistic piece by combining different pictures, objects, or materials and arranging them together on a surface. Full definition
If you don't like to show photos of yourself you could also create a collage of your interpretation of the look. (40plusstyle.com)
~ Create a collage using words you find in magazines or images that express how you are feeling when you reach for sweet foods. (nourishholisticnutrition.com)
You can also think of it as the modern day equivalent of creating collages from torn - out magazine pages. (artbusinessnews.com)