"Notion supports up to nine lines of lyrics under notes in the score .
1 . Ensure you are in Edit mode .
2 . To specify a verse, press the letter L then press the verse number (1 to 9) ."
THE GOTCHA' is you have to activate Lyrics with the hot-key "L" then press the verse number. It doesn't seem to work via the "Lyr-ics" button in the Entry Palette. Had me going for awhile too.