To create a new template, click on "Create New Template" from within the Template Manager. Don't forget, you can import templates that have already been built by clicking "Switch to Import Mode" (seen below).
You'll be greeted with a screen that is, essentially, the Designer but modified to support creating templates.
1. Template Details
You may create the name of the template here and choose to designate it as a favorite.
2. Add Product
You'll want to start here; add as many products as you want and position them accordingly on the wall. Don't forget to use your keyboard shortcuts to make building templates quick and simple!
3. Gallery Level Actions
These actions apply to the entire gallery.
When you're satisfied with your template, click "Save New Template" to save your template.
For additional details on adding products and gallery level actions, please see the Designer documentation.