Masks4:11 with Shon Dempsey
As we make adjustments to our photos, we’ll take a look at using masks with layers to isolate adjustments to a specific portion of our photo.
- Masks - allows a layer to affect only a defined area of the canvas. History Panel - keeps track of each action taken on a document for the current session.
- Snapshot - Saves a defined point in the document history allowing you to revert to that point in time.
- Flatten Image - merge all layers in a document to a single layer, committing to a single layer.
- Marquee tool - creates a selection area to manipulate or take action on within a layer.
Now that we have a couple of adjustment layers for 0:00 our photo, let's take a look at Masks. 0:02 Masks allow a layer to affect only a specific 0:04 area of a canvas that you are able to define. 0:07 This is super handy when you want to adjust the greens in the grass, or 0:10 the blue in a sky without changing those colors in the rest of the image. 0:14 Let's view our Layers panel. 0:18 White rectangle and our adjustment layer, is actually a mask. 0:20 When Option clicking on a mask, we're able to view just the mask itself. 0:25 Masks use gray scale to determine how much of the layer is applied. 0:30 Since it's white, it means the adjustment layer is affecting the entire canvas. 0:34 If it were a 100% black, it would make no difference or 0:38 would make the layer transparent. 0:42 Before we make some adjustments on what we want to do, 0:44 let's visit the History panel and take a snapshot of where we're at. 0:47 The History panel tracks each action on your document for the current session. 0:51 To save a point in history we can take a snapshot. 0:56 Click on the camera icon in the History panel to do so. 1:00 This creates a thumbnail at the top of the History panel. 1:03 Now we've saved a point in history of our document that we can revert back to 1:06 at any time. 1:10 We can take as many snapshots as needed 1:12 which can help us compare paths we might explore. 1:14 Okay, back to our Layers panel. 1:18 Let's test out our mask by using our Marquee tool. 1:20 Choosing a portion of the mask and deleting it. 1:24 So again, we're viewing simply the mask itself for 1:28 this brightness in contrast layer. 1:31 Notice how we've got our background color black in our deleted section. 1:40 So this area will not be affected by the adjustment layer. 1:44 Click on a different layer or on the adjustment layer icon to view our image. 1:48 Now we can see how this adjustment layer has affected our image in this area. 1:54 Let's try another example outside of an adjustment layer. 1:58 Let's add a brand new blank layer from the Layers panel by clicking 2:02 on the New Layer icon. 2:05 I'm gonna go ahead and move this up in the order as well. 2:07 And I wanna add a gradient to this entire layer. 2:10 I'm gonna use the Gradient tool, and just click and drag to make a gradient. 2:14 Now, let's add a mask to this layer from within the Layers panel, and 2:19 then Option-click on the mask to view the mask. 2:23 Now let's see what happens when we select just a portion of the mask and 2:29 fill it with a white to black gradient. 2:33 Notice how our gradient now, while we're viewing the mask, 2:41 is only in black to white. 2:45 Click out of the mask. 2:49 And wallah, the green is only visible 2:50 in the white portions of the mask and it's completely empty in the black. 2:55 Masks provide a lot of options for creativity, as well. 3:00 So now that we've properly mucked up our photo, for the client, let's 3:03 undo all those changes, and revert back to the snapshot from our History panel. 3:07 And I save that snapshot while viewing the layer. 3:15 So I can actually just click out of that mask layer and view our image. 3:18 These are incredibly helpful for 3:24 allowing us to explore our creativity without consequence. 3:25 The only caveat is that the history clears out the document as soon as you close it. 3:29 So the snapshot itself is not saved to the file. 3:34 We're now ready to prep this image for use in our project. 3:38 Since we have multiple layers affecting this image, we'll wanna go ahead and 3:41 flatten them, so they don't carry over to the final image. 3:44 To do this, we're gonna go into the Layers menu. 3:48 And choose Flatten Image. 3:50 We can export this image to a new file such as a JPEG if we want, but 3:56 in this case we're gonna go ahead and leave this tab open. 4:00 In our next video, we'll now use the properly adjusted image and 4:03 combine the other assets we received from the client into the proper layout. 4:06
You need to sign up for Treehouse in order to download course files.Sign up