Library Maintenance
When to reindex the library
Use Library Settings → Reindex when:
- Thumbnails are missing or stale after big Finder changes
- New files do not appear even after Refresh
- You copied thousands of images into an opened folder outside LunaFinder
- Something feels “out of sync” with what is on disk
Reindexing is different from AI Search → Reindex All Images, which only rebuilds AI embeddings.
Requirements
Library Settings is available only when a folder is already open. If no folder is selected, the section shows as disabled until you use Open Folder.
What Reindex does
According to the in-app description, Reindex:
- Rebuilds the library cache
- Refreshes thumbnails for all images
A warning notes this may take a while on large libraries.
How to run it
- Open Settings.
- Expand Library Settings.
- Read the warning about duration.
- Click Reindex.
- Wait for progress notifications (indexing / thumbnails) to complete.
You can continue using the app, but performance may be slower during heavy reindexing.
Refresh vs Reindex
| Action | Scope | When |
|---|---|---|
| Refresh (toolbar) | Current folder view + tree | Quick update after small changes |
| Reindex (Settings) | Full cache + all thumbnails in library | Deeper rebuild |
After reindexing
- Browse normally and confirm thumbnails returned.
- If you use AI Search, check indexed counts in Settings and run Reindex All Images only if semantic search still seems outdated.