by Jim » Thu Sep 03, 2015 2:14 pm
You change the shopping cart template on Commerce Setup > Order system > Layout info.
EDIT: If your store is not version 12 or later the responsive themes will not be available (or work even if you downloaded and installed them.)
Be aware that the new themes often rely on css style sheets that are only created when the store is published. So first try just changing the template at the above location then check the shopping cart to see how it looks and if it doesn't look right you will probably need to publish to generate the css files. You can do that by going to Utilities > Publish and (make note of which options are checked so you can restore them later) then uncheck all options except "Publish files (css, js, ...) during update" and click the Regenerate button. That will generate css files (since you haven't selected a theme it may not do the ones for a particular theme) so they will be available in your shopping cart. You may have to change colors, buttons etc on the Preferences > Layout settings, Commerce setup > Order System > Layout info or Preferences > Store text > Shopping cart (Receipts, Checkout etc). It will depend on which template you use for the shopping cart which settings will be used. See http://www.shopsite.com/templates/cookbook/builtintemplates.shtml (click on the theme you use for the cart) and you will see a list of which colors and other settings are used by that theme.