> For the complete documentation index, see [llms.txt](https://docs.guardianservice.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.guardianservice.app/technical-information/users/standard-registry-users-schemas-and-policies/schemas/schema-templates/apply-a-schema-template.md).

# Apply a Schema Template

Apply a reusable schema template to a draft policy.

## Prerequisites

* You are signed in as a Standard Registry user.
* Your role carries permission to manage draft policies and schema templates.
* The target policy is a draft with no template applied.

## Steps

1. Open the Policies grid and find the target draft policy.
2. Select **Apply Schema Template**.
3. Choose the draft template, or a published template version.
4. Review the schemas and restrictions that will be copied into the policy.
5. Confirm.

## Result

The policy receives copies of the template schemas and stores a snapshot and binding recording the template it came from.

## Troubleshooting

**Why is Apply Schema Template unavailable?**\
The policy already has a template applied. Update the applied template instead, or detach it before applying a different one.

**Why can't the policy be published?**\
The policy is linked to a draft schema template. Publish the template first, or detach it from the policy.

**Why are the controls on a locked field unavailable?**\
The applied template locks that field. Change the field in the template, then apply the template update to the policy. Detaching the template removes all restrictions.

**Why can't I add a field?**\
The applied template disables custom fields for that schema. Enable **Can add custom fields** in the template and update the policy, or detach the template.

## Related

* Concept: [Schema Templates](/technical-information/users/standard-registry-users-schemas-and-policies/schemas/schema-templates.md)
* Task: [Update an Applied Schema Template](/technical-information/users/standard-registry-users-schemas-and-policies/schemas/schema-templates/update-an-applied-schema-template.md)
* Task: [Detach a Schema Template](/technical-information/users/standard-registry-users-schemas-and-policies/schemas/schema-templates/detach-a-schema-template.md)