How can I add a custom EPSG to the Map (Geometry) Viewer in PGAdmin4,

[Basques, Bob (CI-StPaul)]

All,

Following the appreciation thread and saw the reference to the geometry viewer, 
I didn’t even know that was in there.  Anyway, nice, but we have a custom EPSG, 
where do I add this into PGAdmin4?

Also, it would be nice to add in our own background mapping layers as well, is 
there a method for adding in WMS/WFS to the layer list?

Thanks

bobb