This is from the BIAB Help File:

"The Lyric Document window displays a full screen of formatted lyrics so you can easily copy and paste lyrics to and from your favorite word processor. If you have the lyrics available you can quickly paste them into Band-in-a-Box. These lyrics will show up on the Big Lyrics window, so that they can be seen during playback.

You may already have the lyrics to your song typed into a word processor, nicely formatted with font/color/bold choices etc. Previously, you would need to retype them into Band-in-a-Box and would lose your formatting. Now you can simply Copy/Paste them to/from your word processor. This allows you to quickly add lyrics to any Band-in-a-Box song.

You can open this window by choosing Window | Lyric Document Window, or pressing Ctrl+Alt+Shift+L. In addition, if "Auto-open lyrics window for songs with lyrics" is set to true in the Lyric Window Options dialog (Opt. | Preferences [Big Lyrics]), the Lyric Document Window will open up automatically when the song is loaded, and close when the next song is loaded.

To use the window, type or paste in text from a word processor. You can select fonts and colors as you would in a word processor. Since the data is stored in RTF format, it should look very similar to the appearance it would have in WordPad.

You can transfer "line based" or "note based" lyrics from the Notation screen of Band-in-a-Box to the Lyric Document window with the Lyrics | Copy Lyrics to Clipboard menu command. This launches the Options for Copy Lyrics to Clipboard dialog allowing you to select which elements to copy (line lyrics/ note-based lyrics/ chords) and formatting options."