For a conventional frequency:
Press these keys: PGM, NEW, CONV. Then press your down arrow to Freq, hit your right arrow and then insert your frequency and hit Enter. Now go to Tag and hit your right arrow and name your entry (such as “PD dispatch”
and hit Enter. Next scroll back to the top where it says Scan Lists and choose the one you want by using your right arrow. Note that pushing Select causes an asterisk to appear/disappear and the asterisk means it is assigned to that Scan List. Hit Save. Repeat for each frequency. Press Scan and enable that scan list by pressing the number that corresponds to it (if over 10 you have to press FUNC for the fist digit).
Hope this helps!