How do I change reading in C degreeas to fahrenheit?

I expect that it depends on the specific model of thermostat, but I found link to the owner's manual for one model here:

http://www.google.com/url?sa=t&rct=j...vlkkNG-hmB6oPg

And it indicates that there is a F/C switch on the circuit board (which you access by removing the cover, and then: