The selector at the top of the left rail says which Space you are standing in.

Home, primary, a hundred and sixty-one items.

Switch to Research, seventy-three items.

Settings puts it in one line: Spaces hold separate threads of your understanding.

Each item lives in one Space.

Every surface follows it.

Today in Home reads: a quiet return to what you've been thinking about.

Switch, and the same day rebuilds from what Research holds.

Different items, a different order, its own caught-up marker.

Each Space keeps its own day.

Inbox goes further.

Research has no feeds yet, so its Inbox is clear, while Home's own arrivals wait in a queue of their own.

Two separate queues, rather than one behind a filter.

There is one more entry under the Spaces themselves: All Spaces.

On Today it is a different layout entirely.

One heading per Space, a Bridges section, and the caught-up line.

It is a survey of everything, rather than a day's work.

Connections is the one to watch.

On All Spaces the page becomes Bridges Across Your Spaces, and shows you what crosses between them.

So a busy account can look quiet here.

Pick a named Space and Suggestions comes straight back.

Read the selector before you read anything else.