1. In your project, go to the Sources screen, to add or edit an annotation for any source.
![Image of NoodleTools menu bar with the Sources option selected](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/6083447138/original/bssTSI4L0u-HtQ5kCez_4D59Dq8nVrySaw.png?1556473309)
2. Click the "Options" button next to the citation for the source you want to annotate, and then choose "Edit."
![List of citations with the Options button expanded to show where the Edit option is found](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/6092623074/original/A17j6-oG5OpDXDBDkWg2WyoKaVlqUUCyBA.png?1569283192)
3. On the source form, scroll to the annotation window where you can add annotations or edit an existing annotation. Annotations will auto-save as you type, which ensures you don't lose any work.
![Annotations section of the Source form](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/6092622965/original/AEH3qvcQHZKEjk8gCJsMlGI7XNq8bE_3Sg.png?1569282722)