SketchUp 2016 Wish list

This is dead easy, but you need a reference first: I normally draw a box so that I can see a red, green and blue face;

  • select the area you want to rotate (eg an elevation)
  • click the rotation tool
  • hover over the plane you want to rotate in so that the protractor tool changes colour
  • hold [shift]
  • move the cursor to the line you want the axis to be on
  • click
  • move in one direction
  • type “90” [return]

done
You will have to rotate end elevations upright first, then rotate it 90º in the blue axis.