When I edit a vertex of a line or a polygon, the line segments on each side of the vertex become completely transparent. This is fine if the vertex itself needs to move to a specific location, but if you are moving the vertex in order to align the line with a feature you are basically working blind.
I have tried to change segment colour in the Edit sketch symbology and whilst this changes the segment colour it does not stop it from becoming transparent as soon as a vertex is moved. I have also tried changing the Compatibility settings in the ArcMap properties but I see no difference on any of the settings.
Any ideas on what to try next?