The Dashboard settings can be accessed by clicking the Ellipsis button on the toolbar:
From there you can select Edit mode in order to Add new or existing Views to the Dashboard or remove existing ones. You can also rearrange the Views on the Dashboard while in Edit mode. More info on that topic can be found here Edit Mode in Dashboards
Force Refresh has been covered in Force Cache Refresh
Ticking this box enables Carousel mode which automatically changes the Dashboard every 30 seconds or the number of seconds you enter in the Carousel Interval.
You can change the display order of the Dashboards by dragging them up or down to reorder.