Tag films and shows, and each tag becomes a collection in Jellyfin: a Kids shelf, a Christmas one.
In Broadcast: the title’s page, More, Manage files.
In Classic or Neu: the title’s page, Manage.
Type its name and pick it from your library.
You type a name and pick it from the list.
This is for a film you already have. Press Back and pick another.
Its page.
Type a tag (Kids, Christmas, Dad’s films) and press Enter. Tags already in use are suggested as you type.
In Jellyfin, every tag is a collection of the same name, a few minutes after: a Kids collection to browse, or to share with a child’s account. In Usherr’s Library, the Tag filter shows just those titles.
In the Library, Select, tick several titles, then Tags adds a tag to all of them. The add window has a Tags box too, so a new film can start on the shelf.
Taking a tag off takes the title out of that collection. Collections you made yourself in Jellyfin are never touched.