Map does not fill viewport / frame

[DanielMatranga]

Has anyone else had an issue getting the map window to expand to the full area? Mine is adding grey bars at top and bottom and will not fill up the full frame.

[DanielMatranga]

Update: I had to create a new map within the ArcGIS Pro project, copy each layer group over to that new map, then delete the old map in order to solve this issue.