Type Control-L. Up pops a bunch of stuff.

There is a place that you must tell it you want 1 lyric line (or 2 or 3 or whatever. Do this first, it is set to "0" otherwise.

Then go to the tab for Lyric Line 1 and start typing. (or cut & paste in from any other program if you already have the lyrics in a word processor)

If the print is too tiny go to the Page Setup stuff and reset the font for 'staff lyric' to something big.