Under build you will find and be able to:
Existing templates you have previously saved
Create new or Modify existing templates
Click on Build on top menu to open this section.
All existing templates will be listed in this page.
You can alternate the views between List and Thumbnail. Above you are seeing the List View. Click on Thumbnail mode icon to top right.
This is the Thumbnail View.
Click on List mode icon to right top to come back to List View.