This forum is dedicated to discussions pertaining specifically to the Motorola ASTRO line of radios (those that use VSELP/IMBE/AMBE), including using digital modulation, digital programming, FlashPort upgrades, etc. If you have general questions please use the General or Programming forums.
If it's trunking it is in the personality screens
You can also program the button out from the control head under controls.
However it will still try and affiliate.