lost collection?
I opened Zotero on my Mac and click for new collection - was supposed to be a sub-collection - but should the existing collection just disappear? I can find the collection in Zotero on Firefox but not in the Zotero app! This is a large collection for my PhD thesis - and I really need it where it was before
If you haven't figured this out, I'm guessing that you just closed the left-hand collections pane in Zotero. Click along the left edge to show it again.
https://www.zotero.org/support/sorting