The new map screen is where you can choose the map you want to create a new mission on. Up to six choices will be available in Anvil Editor 5.4.
Maps are high quality images made by BI forums user 10T
Choose from five different objective types
The new icons and a Windows 8 look and feel in version 5.4
Add victory triggers on every objective (or some, or none).
Set the occupation levels of objectives, and show warnings where you are trying to do something insane.
Set triggers when all objectives are completed, or selected key objectives are completed
Place and link objectives so that they are revealed in sequence. Screenshot from version 0.1 of Anvil.