Am I right that there is no way to edit or even view distribution lists after you have made them? This seems sub-optimal.
You can of course view and edit distribution lists. A distribution list is a specialised contact. Just open the list like you would open any other contact, so you can view the exiting members and remove or add more.
The Documentation (F1) had more on distribution lists.
Okay but it won’t let me make any changes! When I try to change the email address for one of the recipiens, I get a message saying “The Item folder is read-only.”