It appears to be the Fusion.Widget.Measure.Marker class, whose label is driven off of the <Units> widget extension property - Jackie -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Acres-in-the-Fusion-Measure-Tools-tp4481821p4490692.html Sent from the MapGuide Users mailing list archive at Nabble.com.