Click on Profiles > Advanced > Click your Options Button ( little BB Icon to the right of your trackball) and Click Edit in the Menu window > Scroll down to SMS Text and push down on your TrackBall
There you will find a list of your Options for that Profile. You can select what your device does in and out of the holster!
Hope that helps... by the way.. you can also create new Profiles there as well.... when you click on the Options Button, above the Edit option is New Profile. Click that and set as you like!