# Overview of Custom Assembly Overlays

URL: https://chainguard-docs-preview-git-create-pull-request-patch.chainguard.app/chainguard/containers/custom-assembly/overlays.md

How Custom Assembly Overlays use overlays and bindings to apply customizations to a subset of a repository's tags, or to every repository in an organization or folder.

## Pages

- [Managing Custom Assembly Overlays with chainctl](https://chainguard-docs-preview-git-create-pull-request-patch.chainguard.app/chainguard/containers/custom-assembly/overlays/chainctl.md): How to use chainctl to create overlays and bind them to specific tags of a repository, or to every repository in an organization or folder.
- [Managing Custom Assembly Overlays with Terraform](https://chainguard-docs-preview-git-create-pull-request-patch.chainguard.app/chainguard/containers/custom-assembly/overlays/terraform.md): How to use the Chainguard Terraform provider to create overlays and bind them to specific tags of a repository.