Editing any of the system, department, or channel details can only be done in Sentinel if you do not have extreme upgrade.
Can do in radio with extreme and also get analyze, discover, and other options with extreme. If you own an HP radio recommended the upgrade for $50 to make the radio complete in terms of what it can do. When it was $100 could only conditionally recommend.
Mark
536/HP1e/HP2e/996P2/996XT/396XT/PSR800/PRO668/PRO652