@kurl8rocks You didn't mention what version of OpenLP you are running....might make a difference! In version 2.9.2 you should be able to modify the footer in the song page of settings. I think there may be something I don't understand about modifying the footer, but I did find that I could add the song's
to the footer and could place One License information to the song and have it displayed in the footer.
Go into Settings and select the Songs page.Add `One License: ${topics}<br/>` to the footer template on the line below the ${title}<br/> and press Enter.Save your changes by clicking on the OK button in the bottom right of the window.Edit a song and put the One License number in the Topic text box and click on the `Add to Song` button.Save your edited song.Display the song to the Live display and your One License number should be displayed.
As a side note, leave the CCLI field blank and that line won't be displayed.