Limiting adjustments with clipping masks

- [Tutor] As you begin to work with…more layers in Photoshop,…you're going to want to control…which layers are affected by the adjustment.…I'll use the Adjustment Layer icon…at the bottom of the Layers panel…in order to add an Invert adjustment layer.…Because it was added at the top of the layer stack,…all of the layers underneath it are inverted.…If I want to only affect a single layer,…then I can create a clipping mask.…Let's say I want to only affect the upper-middle layer.…

I'll reposition the Invert adjustment layer…so that it's directly above that layer…in the stacking order,…and then from the layers panel,…I'll choose Create Clipping Mask.…By clipping the Invert adjustment layer…to the upper middle layer,…I'm restricting the effect of the adjustment layer…to only that layer.…Alright let's undo that by using Command + Z…and this time I want to affect…not only the upper middle layer,…but also the lower left and the lower right.…

So in the Layers panel I'll select the upper middle,…I'll hold down the Command key…