cannot assign mouse clicks to any button

[skypickle]

I have noticed that DCs sometimes restricts whether certain controls can be assigned to specific controllers. You can identify these forbidden assignments in the controls setting dialog because they have a darker blue hue. How can a controller be 'enabled' for binding a function? For example, in cockpit visual recon mode where you also need mouse left clicks and right clicks? I guess the most generic solution would be to allow mouse clicks to be bound to any button.?

Edited January 19, 2022 by skypickle
clarification