What is "Reindex Item"?

TVG

Hello,

I wonder what happens when I click on "Reindex Item" and what is the meaning when "Indexed" is "Yes" and when it is "No"?

Many thanks.

qqbb

This will refresh the full-text index of a PDF attachment. See here:
https://www.zotero.org/support/preferences/search
https://www.zotero.org/support/searching#pdf_full-text_indexing