Templates give an element a ready-made set of cards and fields, so your characters, places and magic systems share a consistent layout. A template supplies structure only. It doesn't write any content for you.
Applying a template
1. Open the element
Open the element, and the version, you want to apply the template to.
2. Click Templates
This opens the Template Marketplace.

3. Find a template
In the Discover tab, search public templates, or narrow them down by element type with the category filter (All Categories, Characters, Locations and so on). Click a template to see its cards and fields, its description and any preview images.
4. Click Apply
Use Apply on the template card, or Apply Template in its detail view.

5. Confirm if you already have cards
If the element already has cards, you'll see Overwrite Existing Cards? Applying a template replaces every card on the canvas, and the content in them, with the template's empty structure. Click Overwrite and Apply to go ahead, or Cancel.

This can't be undone. It doesn't delete the element itself, and it doesn't touch the element's other versions.
Templates and versions
A template applies only to the version you're looking at. Other versions keep their own cards and content. To experiment safely:
apply templates early, before you've filled an element in, or
create a new version first, then apply the template to it. See Worldbuilding Versioning.
Template Marketplace tabs
Discover: public templates from the community.
My Templates: templates you've made, public and private. See Creating Worldbuilding Templates.
Recent: templates you've used lately.
Pinned: templates you've favourited with the heart icon.
Recent and Pinned are saved to your account, so they follow you to any computer or browser you sign in on.