Copyright owners may give other people permission to use their works. Many people who write up dance sheets are happy for other people to copy and distribute their dance sheets for free. One way to notify people of the uses you will and will not allow is to put a statement on your dance sheets. For example, you may put a statement on the dance sheet stating that people can copy it provided that your name is left on the dance sheet to let people know that you are the author of that sheet.