The mini-timeline allows, as the Summary, to navigate a session. It's main advantage though is that it stays visible even in Mixer mode.
The range of time covered by the mini-timeline is set by Right clicking the timeline, and chossing from 30 seconds up to 20 minutes.
The mini-timeline also shows all the markers (both start/end and user set ones). Clicking a marker jumps to that point on the timeline, allowing for quick access to key timings in the session.
While hovering with the mouse over the mini-timeline,