You can open any reference in your library and add additional information or fields. This is handy for those who want to add their own searchable keywords. Just view the record by clicking on the hyperlinked title.
To show only the fields that have content, click the link at the top right corner that says Hide Empty Fields. To display all fields again, including those that have no content, click the Show Empty Fields link. Note: the use the Research Notes field you will need to select Show Empty Fields.
To modify a particular field, for example the Journal field, click in the field you want to change. A text box will open up for you to make any changes.