Programming scan is vastly easier if you have your radio set to select ZONES from a menu item enabled from the keypad and channels selected from the top 16 position knob.
In the xts you can only have 16 personalities set to the same scan list number in cps to scan.
You cannot add other personalities to the above mentioned 16 members to the same scan list from a different scan list, the 16 scan members need to be assigned in cps first and it will not let you scan across zones members if you have different scan list members in the same zone it will only scan 1 particular SCAN list.
That is, if you have a zone with half of its personalities from scan list 1 and another half of the zone has members from scan list 2, when you turn /enable scan it will only scan those members from the scan list of the channel which it is set to when scan is turned on, it will not scan members of different scan list even if in they are in the same zone.
To program your scan channels, assuming that all 16 members are assigned to the same scan list, and that all 16 personalities/members have the same scan list number assigned in their personality SCAN window of cps, then using the keypad arrow keys press the PROG key, then using the keypad arrow keys press the SCAN icon then rotate the CHANNEL select knob and then press SEL or DEL and for SEL you will see a ---/---> icon indicating that the channel is in the scan list.
Once a channel is in the scan list you can select a priority 1 channel by pressing the sel key one more time and a priority channel 2 by pressing the SEL key two more times, a solid PERIOD/DOT or a flashing PERIOD/DOTwill come up indicating PRIORITY 1 OR 2 channel.
Even though you may have priority 1 and 2 enabled in CPS/SCAN you can disable either or both priority channels from the PROGRAM SCAN keypad selection with the radios keypad.
RCL selection lets you scroll through the entire 15 members of that scan list each time RCL is pressed.
Lets assume that the first 15 channels in your zone are set to the same scan list and all 16 channels are in the same SCAN list number, and that this zones scan list is set up for user/programmable scan and that user/programmable priority 1 and priority 2 channels have initially been enabled in the cps SCAN setup, then if you turn the scan on with the channel selector knob set to channel 16, all 16 channels will be scanned.