Could be used for items such as:
On Flight Hub 2:
The annotations tab is the second one down on the left side of Flight Hub 2:
You can search, import data (kml/kmz), export data (kml/kmz), and create folders.
For each folder you can expand it, lock it, distribute it to pilots, or trash it.
Note Distribute button will be Blue if the folder contents are currently visible on the pilot’s screen.
Remember to use a drawing tool tap it once and a blue triangle will appear in the top right, this means you are in drawing mode for that tool, after you are done drawing lines you have to tap it again to exit drawing mode and the blue triangle in the top right of the icon will disappear.