look, I appreciate that you find the forum helpful, but we need you to put a little more effort into your questions. I'm not sure what you mean by the "hide" command (there is no command of such name in Zotero). As a rule of thumb, you'll need three sentences for a meaningful question. We really don't have the resources to play guessing games.
Right-click on My Library (or group name). There will be an option to add these special collections back in. You can hide them because not everyone wants to see them.
Is there information on this "hiding issue" in the Documentation?
The Unfiled Items allows drag and drop - which I often use when dragging an item to a collection
But dragging between the other collections will just make copies.
I use the command "delete item from collection" and it will appear in Unfiled Items. From here I can drag and drop where I want
So why would somebody want to hide the Unfiled Items ?
Upgrade Storage
Rightclicking - Hide
What is the purpose of hiding these collections and how do you unhide ?
The Unfiled Items allows drag and drop - which I often use when dragging an item to a collection
But dragging between the other collections will just make copies.
I use the command "delete item from collection" and it will appear in Unfiled Items. From here I can drag and drop where I want
So why would somebody want to hide the Unfiled Items ?