But for the system where you are holding on a TGID, if you have a talkgroup tagged as Priority, and have the system set to enable Priority Scan, then it will do what you are describing: Holding on a talkgroup, but switching to a TGID tagged as Priority within that same system that you are holding on. Trunking System Priority Scan cannot be enabled, or disabled via a keystroke combination via the keypad. It can only be set, or disabled, by editing the specific trunked system's options in it's Favorites list, either via the scanner's menu, or in Sentinel before sending the list to the scanner. When trunking priority is enabled, there is no indication of that on the display. The PRI on the display only displays when Conventional Priority is engaged. (But, as noted, you cannot use conventional priority unless you have an actively scanned list that has one or more Priority channels in conventional systems.)