Whatcha confused about Spruceeee ?
Open the link then Click on for larger image and other views.
You can zoom in and see there are 2 sets of degree settings non the saw. Look at each one sitting together high/low,they will always add up to 90 degs. Most all saws use to be like it.



http://www.amazon.com/Bosch-4310-10-...5664833&sr=8-1