Unfortunately, I do hot have the exact model you do, so step-by-step detail may not be helpful, from myself.
However, you can check this link to find tons of great information about your GPS and how to use it.
I do, so let's try this.
Go to Setup Map->Data Fields->Dashboard->Compass
That will switch from Geocaching Dashboard to Compass Dashboard.
Just tried this and sure enough that works! Thanks so much! Never would've guessed this