The Item Library is your campaign's master list of reusable items, organized into containers and folders. Build it once, then pull items from it to stock shops, player inventories, encounters, and more — so you never rebuild the same potion or sword twice. Find it in the campaign's left navigation. (The library is also one of the sections you can clone between campaigns — see Cloning Campaign Data.)
Who can do what
All players can view the library and copy items out of it into their own inventories. Making changes — adding items, containers, and folders, and copying items into the library — requires the Item Librarian admin role (Game Masters have it automatically). The library is created by a Game Master with the green "Create the Item Library" button.
Managing the library
Item Librarians get a toolbar with "Add Item", "New Container", "Manage Folders", and a teal "Search" button. Items are grouped into folders (tabs across the top, with an Unsorted tab) and containers. To duplicate a whole container into another inventory, use the orange "Copy Container" button on it — the original stays put in the library.
Filling and using the library
To add an existing item from anywhere into the library, open it and click the teal "Copy to Item Library" button in its header (Item Librarians only). Going the other way, anyone stocking an inventory can load the library and use the "Quick-copy" buttons to pull items in. Folders and containers can be marked secret, in which case only Game Masters see them.