If you click a template's properties, the same icons appear as when you click a page's properties. However a few panels are different.
At the top right you will find the Panel overview icon (looks like a cube). Via this, you can get back to the overview of the panels available for Properties.
You can click on the magnifying glass to search among the available panels. For example, if you do not know which category your subscription is under, you can search for it instead.
The page published: 2019-02-05