Make a Clip Black and White?

In the Layers panel, click on the layer for the clip you want to appear in black and white. Then, click on the Create New Adjustment Layer icon at the bottom of the panel (it’s the fourth one from the left; it looks like a half black/half white circle), and choose Black & White. Now, your clip is black and white—it’s just that easy. You can make adjustments to this black-and-white conversion using the sliders in the Properties panel.