Relax I am here....
Direct lift control is about giving the pilot (or autopilot) the ability to vary the lift at constant pitch attitude (or constant angle of attack if you prefer)
It is often only deployed during the approach phase.
When done aerodynamically it uses spoilers that are set half out at the start of the approach then moved in and out from that mean position to vary the lift.
It removes the effect of aircraft pitch inertia from the handling qualities issues.
There has been a stack of stuff about DLC before. Try a search.
The Tristar was one type that used DLC.