> For the complete documentation index, see [llms.txt](https://docs.santacruzsoftware.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.santacruzsoftware.com/printui/core-concepts/layers-frames-and-editability.md).

# Layers, Frames and Editability

PrintUI uses InDesign layers and frame options to decide what appears in the editor and what users may change.

## Standard layers

| Layer type          | Use                                                                        |
| ------------------- | -------------------------------------------------------------------------- |
| Background          | Fixed content behind editable objects.                                     |
| Foreground          | Fixed content above editable objects.                                      |
| Editable layers     | Regular layers containing content users may edit.                          |
| Background No Print | Reference content shown in the editor but omitted from final output.       |
| Foreground No Print | Front reference content shown in the editor but omitted from final output. |
| Imposition          | Placeholder frames used by imposition templates.                           |

For best results, keep Background layers at the bottom of the InDesign Layers panel and Foreground layers at the top.

## Frame controls

Use the PrintUI Frame Options panel for frame-specific behavior.

![PrintUI Frame Options panel](https://2074487377-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbVTVwbyzHhkg2rOG88AM%2Fuploads%2Fgit-blob-1d266a01f1616feace59779375d80a671ffb2884%2Fframe-options-panel.jpg?alt=media)

**Keywords** can be sent to gallery connectors so selected image frames show relevant image choices.

**Non-selectable** makes a frame unavailable for direct user editing while still allowing API-driven changes.

**No Preflight** skips selected preflight checks for special cases. Use it rarely.

**Fill Text Frame** lets text shrink or grow within minimum and maximum font-size limits so content fits the frame.

**Content Validation** checks text against a required format, such as an email address or phone number. Strict validation reverts invalid edits.

## Locking and restrictions

Locked objects and layers limit movement and resizing. Run-time options can further limit editor tools such as Add Text, Add Image, Add Rectangle, color entry, page editing, text palettes, and image palette options.

When a control is unavailable in the editor, check both the template setup and the run-time options used to launch the editor.


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