I'm at work and can't pull up CBBE so keep that in mind. If you're looking at the main screen with all the sliders, there should be a "build" button down by the middle bottom of the screen. After you've made your body, you "build" it and it is now the model the game will use. Then up at the top of the screen there are drop down boxes that let you pick the "groups" of clothing/armor to "batch build.' You can do one item or more items in a single group if you want to test. If not, leave those drop down menus empty and look for the batch build button at the bottom left of the main screen. This will build all your cloths/armor that CBBE recognizes to fit the body you made. Sorry if it's confusing, doing it from memory.