When you are in working on a Recommendation or Application Event, you have the ability to use Map Notes and layers when you go to edit the locations. Above the Locations section you will see the button below.
When selected you will be able to edit the locations as well as edit and/or add additional map notes. You can also display layers.
Saving Map Notes
In this screen you can save and update Map Notes as soon as you click on the “SAVE” button within the Map Notes controls. This is true even if you do not add or update the locations, or Save the Recommendation or Application event.
Click here for more information on Map Notes