Setting a file to read-only status helps you to protect the file from changes to the file's content or accidental deletion. If a file is set to read-only, you will not be able to save changes to it unless you turn off the file's read-only status.

1. Find the file you want to edit.

2. Right-click the file (PC) or Control-Click (Mac), and then click Properties.

3. Click the General tab, clear the Read-only check box, and then click OK.

4. Edit and save your file as needed.

If you do not want to change the read-only status of the file but you still want to make changes to the file, you can save a copy of the file with a different name, and then save changes to the copy.