Configuring a single mini chart in Multi Chart view is easy since there are only a few things you can do:

  1. Displaying the indicator's description by hoovering over the metrics
  2. Changing the time horizon
  3. Changing the scale
  4. Downloading the chart
  5. Editing the metrics displayed, the name, and the group
  6. Deleting the chart
  7. Reordering its place

This is how to do it: