Set Keyword Shortcuts… — assign up to nine keywords to ⌃1–⌃9, so you can toggle a keyword on the selection with one key.
Enable Sweep (⌥⌘K) — Lumidex Studio's take on Lightroom's Painter. Load a rating, flag, colour and keywords into the toolbar well, then drag across grid cells to apply them all at once. See the toolbar well for what's currently loaded.
Edit Color Label Names… renames the five colour labels (Red, Yellow, Green, Blue, Grey) to your own words. It's a display-only rename — the underlying colours are unchanged, and your chosen names appear everywhere labels are shown.
Automatically Write Changes to XMP — when on, metadata edits are written to XMP sidecars next to your files as you go, so nothing is trapped in the catalogue.
Save Metadata to File (⌘S) — write the selected photos' metadata out to their files now.
Read Metadata from File — pull metadata back in from the files on disk.