2. You can be in the Timeline or Map view and click the note icon in the top right next to "Recommendations".
3. Click "Add" at the bottom right.
4. Type whatever note you want that will be associated with this field.
5. Click "Save" in the bottom right.
6. You can see on the right side who left the note and on what date. This note is a general note for this field and is NOT tied to a direct insight/mission. You can view it in the Map or Timeline view.