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On the Plan screen, view the area for the plan:
Selecting 'edit' allows you to change the name of the plan.
Haven't been able to load beyond this page
The following steps are currently described without screenshots as the web pages were having perfomance issues when loading maps.
If you scroll below the map, you see a table that allows you to check boxes on or off, effectively, selecting the areas below national level that you want to spray.
Each of these levels below national level is a hyper link - if you click it you are taken to that level and can select the areas at the unit below that level for selection.
You can continue to drill down until you reach the level of the operational area.
Team selection is still being finished, so you will not be able to interact with the teams listed against the units in the organizational heirarchy.