Collection Browsing (Publishers)

Example Publisher Page with Custom Header
CLU allows you to visually browse your collection starting from your root library (/data) directory. While this documentation refers to top-level directories as "Publishers", they represent whatever folder structure exists in your storage.
Each folder includes a menu providing folder-level management actions.
Publisher Folders

The folder menu provides three options:
- Scan Files: Scans the directory and updates the database for this publisher, indexing newly added files and structural changes.
- Generate Missing Thumbnails: Generates cover thumbnails for all folders that are currently missing art. See Generating Thumbnails.
- Missing File Check: Analyzes the folder to detect missing issues in series sequences. See Missing File Check.
Custom Headers
Folders support custom banner headers. CLU checks for an image file named header.png, header.jpg, or header.gif in the publisher folder. If present, it is rendered across the top of the page. The recommended image resolution is 2200×516 pixels.
Custom Thumbnails
All folders support custom thumbnails. Place an image named folder.png, folder.jpg, folder.jpeg, folder.gif, or folder.webp in the directory, and CLU will use it as the folder's cover image. Recommended dimensions are 200×300 pixels.
Uploading a Publisher Thumbnail
You can quickly assign a custom thumbnail by dragging and dropping an image file directly onto the publisher card from your computer.

Uploading a Thumbnail via Drag and Drop
Once uploaded, the new cover art displays automatically on the publisher card.
Favorite Publisher
Click the icon in the top left of any publisher card to mark it as a favorite. This pins the publisher to the Favorite Collections row on your dashboard for fast access.
Navigating to Series
Clicking any publisher card opens that publisher's page, displaying all child series folders or standalone comic issues within it.