While administrators can edit categories that were created by anyone, most users can edit only categories that they created. You can’t edit standard categories.
To edit a category, double-click its name or click the name and then click Edit at the top of the categories list. The Edit Category dialog box opens; edit the properties as required. See Create Custom Categories.
To quickly rename the category, right-click the name in the Categories panel, enter a new name, and then click Rename.