Hello,
I am using ArcMap 10.4.1.
I have a base map that has the "GCS_WGS_1984" geographic coordinate reference system, it is my understanding that this reference system is referring to a 3d coordinate system. However, if I export the map, I assume the map is actually projected to a flat image, especially since it appears on a flat computer screen? If it is projected, what projection is used because it is not referred to as a projected coordinate but as a geographic type, which is somewhat confusing how the exported map is meant to be interpreted.