# Editor Tabs Reference: File tabs

> Viewing and editing project files.

Glider documentation · The Editor · Web page: https://cgglider.com/docs/editor-tabs/file/

Sections of this page: [Catalogue](https://cgglider.com/docs/editor-tabs.md) · [Scene tabs](https://cgglider.com/docs/editor-tabs/scene.md) · [File tabs](https://cgglider.com/docs/editor-tabs/file.md) · [Singleton tabs](https://cgglider.com/docs/editor-tabs/singletons.md)

Opening a file from the Files dock opens it as a tab. Text files — .txt, .md, .csv, .json — open in an editor; everything else opens in a read-only viewer appropriate to its type.

- Edits save as you type. A .json file saves only while it parses, and Format pretty-prints it.
- Images, video, audio, PDFs and fonts open in a preview. Any other type shows its icon and size, with Open in browser.
- The tab is keyed by file name, so the same file never opens twice.