This is what I do: I use the text feature to write in cue notes associated with certain changes. These start out below the chords but I move them up above the changes. I don't write in all of the melody line, just some (and sometimes many) cue notes to help me out when playing the melody. One of the moderators (pdxdjazz) pointed out that these cue note would not change if your chart were transposed; however, if the cue notes were entered in the Alt Chord field, they would transpose with the chords. You can choose which works best for you.