Step 1
Go to the Manage Displays page. You can find the Manage Displays button at the top left of the screen of Studio:

or the top left of the Business Settings page:

Step 2
On the Manage Displays page, select a Layout you'd like your display to use. If you have multiple screens this article might help you manage your layouts for each screen.

Step 3
Open "My Content" on the left.

Drag your template into a zone of an existing layout (either in the middle of the screen, or the playlist in the right sidebar).

Step 4

Click "Save and Publish" to send the new content to your screen.