If you have your radio set via the EZ Scan software to show a transmitting radios RID, it is just going to show you the ID that radio was given at the time it was programmed into the system it is on (like 105014 or whatever).
If you want your radio to display some other label/tag like 'unit 10' or 'Bob' or 'Engine 12' or whatever, it's up to you to find/figure out that info is and program that into your radio via the EZ Scan s/w along with that original 105014 or whatever RID (under the "Radio ID Details" tab).
You also need to use the EZ Scan s/w to set it to display the new tag/label instead of/in addition to, the default RID ( under the "Advanced Features", then "General Settings" tabs).