How do I correct the Copyright Line on my music??

When I transcribed some music into MuseScore, I was able to fill in the Copyright Line. However, afterwards, unlike some of the other text fields, such as for the Title, Composer, etc., I could not find ANY way to tweak/correct what I entered on the Copyright Line. I need a way to do so. Is this option available at all? If so, how do I do it? If the option is not available, could a fix be put into place to allow me to correct or tweak that line? (So far, I have only saved my music on my local laptop & have not published it anywhere.)

Thanks so much,
Nolan W. Cook
nolanc826@aol.com
847-774-9788 (cell phone)