I have an .mxd where the labels for most features are fully editable and movable. However, they have NOT been converted to notation. They are stored in shapefiles that have no symbology but also have "Label Features" checked off. When a shapefile is checked off, the labels turn off as well. We can't figure out how this is possible but we'd like to be able to recreate this label style since it works really well.
How can I recreate this?
I am not new to GIS, please trust that I understand what a shapefile is.
I am using ArcMap 10.5.1.