How can I enable Hold-to-Scope (quickscoping)?

By default, I can only toggle aiming down scope.

What setting do I pick so I can hold down right mouse to aim?

1 Answer

In Black Ops 2, you will need to rebind a button to "ADS" (Aim Down Sight).

By default, Mouse 2 is bound to "Toggle ADS" (shown below) - you can replace this bind under Options -> Controls -> Combat.