Editing Tessitura Dropdown Defaults

We want to edit the default selection for creditee type when assigning a membership. Right now it defaults to Gift Membership, and while we use that from time to time, our development department has been using the Foundation creditee type much more often. So far it's just inconvenient to have to swap it out every time, but we actually had a few assigned memberships saved with the wrong creditee type because they forgot to change them from the default.

I haven't found any documentation on it, so I don't even know if it's possible. Just hoping some others might have been able to figure something out with this as well.