Some fellow Tmux users I spoke with weren't using the Sessions feature, which I think is one of the coolest features of Tmux. No faulting the Tmux developers for very complete documentation, but it can take a few read-throughs for some of us before the core architecture becomes clear:
- The Tmux Server is a collection of Sessions.
- A Session is a collection of Windows.
- A Window is a collection of Panes which visually subdivide it in the terminal.
- Windows and Panes can be moved and shared between Windows, including Windows in other Sessions.
Having used a modern web browser, you already understand principles 1-3. You can open multiple browser windows (Tmux Session), each browser window has multiple tabs (Tmux Window), and each tab has a web page which probably contains multiple visual sections (Tmux Pane).