The main page for the account report templates will display every report that's been created. By adding it to your favorites, you can make sure it's always at the top of the page, and ready to access.
Access your favorites from any account
Once you've favorited a report template, you'll be able to access it from any account you are working on - no need to switch back and forth!
Convert your templates to Multi-Account Templates
On the right side of each report, you'll see the actions applicable to each template. The Duplicate as Multi-Account Template will create a duplicated version, but with multi-account reporting capabilities.