Allow users to hide fields from related tables in a pop-up

[AmyRoust]

I'm stuck in Map Viewer Classic for any web map that has a related table with records that need to be displayed in the pop-up because I can't hide unnecessary fields from the related table. Here is an example of a related record in a pop-up:

At minimum, I need to be able to hide OBJECTID, ContactActive, and CCC, which can be done in Classic. Ideally, I would be able to create a custom table where I could concatenate the first and last name into one field, and then concatenate the phone number and extension into one field.

[JaredPilbeam2]

On top of that, It would be nice to use the related table more seamlessly, like within the rich text editor. Too many clicks, back arrows, exit arrows, etc... as it is now.