Your profile picture in the top bar → My profile. It opens on My feed — your own posts, newest first. Above them, a cover image, your photo, your name and current role.

Two are about you; two are your work. My publications are the ones you never have to fill in — work published through the networks’ journals and books appears there on its own.

Under About me, every role you list under Experience offers Set as primary affiliation. Only one holds it at a time, and that one is printed beside your name well beyond this page.
Set it to the institution you want credited, and reset it when you move. Leave the old role listed — the record of where you were is useful to anyone reading older work.

Bio, location, experience, education, interests, languages, résumé, linked accounts, and links. It is the part a new peer reads before deciding whether to write to you.
Link your ORCID under Linked accounts. It is the identifier that ties your work together across publishers, and it costs one paste.

Add new resource attaches something to your profile — a URL or an uploaded file, with a name, its creators and a source. A reading list, a dataset, an instrument, a paper of yours held elsewhere.
Two things govern whether a resource can be found: the resource’s own Public visibility toggle, and Resources visibility in Account settings. The dialog tells you how the second is currently set, and links straight to it.

That is your primary affiliation. Open About me, find the affiliation you want credited, and use Set as primary affiliation. It changes what shows in conference programmes and on published work.
Add the new role under Experience and set it primary. Leave the old one listed — the record of where you were is useful to anyone reading older work.
Two things govern it and both have to allow it: Resources visibility in Account settings, and the resource’s own Public visibility toggle. The Add new resource dialog tells you how the first is currently set.
It lists work published through the networks’ journals and books. Work published elsewhere belongs under My resources, or as a link.
Yes — it is the identifier that ties your work together across publishers, and it costs one paste under Linked accounts.