Pages & groups

Open Settings → Pages & groups for a single list of every page, with its groups shown as chips.

What you can do here

Reorder pages - the ▲ / ▼ arrows move a page up or down. (You can also drag pages directly in the sidebar.)
Edit a page - the pencil opens the page editor (rename, icon, layout, columns, groups). This works for the built-in Dashboard too (rename / icon only).
Delete a page - the trash button (not available for the Dashboard).
Add a page - the button at the bottom.

The page editor

The editor (also reachable from the pencil next to a page title) covers:

Name and Icon - see page icons
Layout - Grid or Columns
Columns - Auto or 1-6 (see Page layout & columns)
Groups - add, rename, set icons, reorder with arrows, delete

Next steps