Double Click Middle Button in a view = Zoom to Fit
Double Click on a component Family = Edit the Family (open in the family editor)

Some people like the new Stairs functionality?

Sketch stairs can be added to an Assembly, but Component Stairs can’t…

Multi-segmented grids:
To create a multi-segmented grid, select the Multi-segment tool in the Draw panel of the Modify|Place Grid context tab.  This will enable sketch mode for you to draw the grid line.  This will work on linear and radial grids or a combination of lines and arcs in the sketch, but must be a continuous segment.

Arc grids are also available: