The Faces sub-object rollout enables interactive dragging of cloth objects while they are simulated locally. This sub-object level is useful for positioning cloth within your scenes in a more interactive way.
Starts local simulation of the cloth. In order for the real-time interactive feedback with the cloth to occur, this button must be on.
When active you can drag selected faces as the local simulation is taking place.
When active, you can rotate selected faces as the local simulation is taking place.
Runs the local simulation only when you click the left mouse button. This mode is usually preferred since you can start and stop the local simulation simply by releasing the mouse button. As a result, it makes it far easier to position and rotate the faces of your cloth within your scene.
When on, you can select only faces facing you. When off (the default), you can select any faces under the mouse cursor, regardless of visibility or facing.