From the search filed on the right of the window you can search for design and colorway names, or choose between colorways or colors simulations.
If you wish to make simulations using colorways, select the option Colorways. It will show all colorways which you can search for when using the search fields. Any colorway selected will be applied to the model/object.
The option Colors opens your Color Libraries. Any color selected will be applied to the model/object, and it will be shown in a square patch on the right. As in other windows of this program, the search field is there for you to find a particular color by color or by name.
You can customize the view with the adjustment button next the library name. Choose the size of the patches and to view the color name or not. This adjustments are based on the logged in user and will remain for the user only in coloring colorway and simulations page.