Edit
Your collections
All of your collections live in one place, grouped as released, unreleased, and archived:

What you can edit
You can update a collection's name, description, category and subtype, artwork, and the items it contains.
Reordering items
Collections can hold a mix of content types, and you can arrange the items in any sequence — the order you set is what visitors see on the public collection page.
Open the collection you want to curate and drag items into their new positions. The new order is saved as you go; there is no separate save step for reordering.
Saving and publishing changes
While a collection is still a draft, your edits save themselves. A couple of seconds after you stop, the draft is saved for you — there is no save button to remember.
The small disk icon at the top of the dialog shows where that has got to, and its dot changes colour as it goes: unsaved changes, saving, saved, or couldn't save. Hover it to read the current state. You can also click it to save straight away instead of waiting.
Once a collection has been released it works differently: your edits are held until you publish them with Release changes, so nothing reaches visitors before you say so.
Artwork is the exception: an image you upload is applied when you choose it, not by autosave.
Archived collections
An archived collection can't be edited. Restore it first to continue editing.