Indexing is what lets Grape search your notes by meaning. Every note is converted into an embedding, a numerical fingerprint of what the note is about, and searching compares fingerprints instead of just words.
Where it happens
Open Settings and go to the Indexing tab. A progress bar shows how much of your library is indexed and how many notes that covers. Indexing needs an enabled indexing model, and on desktop the tab warns you if there is none, see Add your own AI models.
Keeping it current
New and edited notes are indexed as you go. The Sync button catches up anything missing, and it is the button to press after a large import.
Regenerate and Delete Index
Regenerate wipes the index and rebuilds every note from scratch, which is mainly useful after switching indexing models, since fingerprints from different models do not mix. Delete Index removes the index entirely, and semantic search stops working until you rebuild. On the Pro plan these two buttons are hidden and Grape manages the index for you. On Lifetime, where the index runs on your own keys, they are there, and rebuilding a large library costs provider tokens.
What is in the index
The index is derived from your notes, and it lives with your library. Deleting a note removes its embedding too.