under windows, tick the virtual singer and under the little black arrow on the left of the melody stave choose song with lyrics
you will get a section under the stave if you click your mouse there you can type lyrics
try importing .kar files to test it, by default it only opens myr files but you can choose, all types inc midi
karaoke files are basically midi files with lyrics.
plenty of free ones of public domain songs on the web.
virtual hymnal project is a good source if you like hymns!!
on my android but if I get on my desktop later today I will post screenshots.