When a zone is selected (by clicking a zone on the map or in the upper-left map area), the map zooms to that zone, and its name and number are shown in the top margin of map with a transparent background.
Various data tables may voluntarily pop into screen, this is where the disable table tool is very helpful; currently this is true for the FBFM 40 Map.
The EVT Map - selected zone has turquoise dashed line and the Existing Vegetation Type menu includes only those EVT mapped to that zone.