Crouch Jumping? Can I adjust the capsule, or how do I do it?

Hello there, Im trying to implement crouch jumps, so crouch in middair, but the capsule snaps to the bottom when changing to half height. Is there a way to have it shift position during middair crouches, and if not, what would typically be the usual way someone would implement a middair crouch to their jumps.

Thankyou for your time.