Options for each type of adjustment vary and can be changed in the context-sensitive Properties panel. The options for that specific adjustment opens in the Properties panel. Double-click on the thumbnail of the adjustment layer you want to modify. Modifying an Adjustment Layer Modify an Adjustment Layer oSelect the Layers panel. Adjustments panel I Add ~ Hjustment ~:~OO~V 1fI~1J~~iii ~E' !~I%ISad:ground Color Lookup Properties 1.0- +-'.", Brightnes~'Contrast. After you create an adjustment layer, you can make changes to it in the Properties panel. When you create more than one adjustment layer, each adjustment is applied to the image based on its stacking order in the Layers panel. You can also use the Color Lookup adjustment to apply a color table (similar to a color profile)- such as crisp winter, flimstock, or foggy night-to map image colors to create an unique effect. For example, you might create a Levels adjustment layer to control the contrast of an image, and add a Curves adjustment layer to correct image color. You can have as many adjustment layers as you need. In addition, adjustment layers will work on any type of Photoshop layer, including the Background. By default, all layers beneath the adjustment layer are changed. 156 Chapter 7 Adjustment layers are applied within the Layers panel and use the Adjustments panel. oUse buttons at the bottom of the Properties panel that allow you to clip the adjustment to the layer below, make the layer visible or invisible, revert to the image state before adjustment was made, reset adjustment defaults, or delete the adjustment. To open the Properties panel, click the Window menu, and then click Properties. Adjust the controls for the specific adjustment in the Properties panel. of adjustment appear on the Properties panel. When you click one of the icons, controls for that type. You can choose from 16 icons representing most of the adjustment layer options. You can also open the Adjustments panel to set adjustment settings. oClick the Create New Fill or Adjustment Layer button, and then select from the available types of adjustment layers. Creating an Adjustment Layer Create an Adiustment Layer o Select the Layers panel. What You'll Do Create an Adjustment Layer Modify an Adjustment Layer Merge Adjustment Layers Create a Temporary Composite Image Control Adjustment Layers with Clipping Groups Delete an Adjustment Layer Use Blending Modes and Opacity with Layers Use Masks with Adjustment Layers Create Masks with Selections Retouch Images with Filters Keep Proper Perspective with Vanishing Point Work with the Lens Correction Filter Retouch Images with Tools and Filters Control Tonal Range Work with the Histogram Panel 155 Adjustment layers come with their own built-in masks, and allow you to control how and where the adjust- ment is applied to the image. In addition to letting you apply adjustments to an image without changing the original data, adjustment layers, because they are separate layers, give you the ability to apply standard layer controls, 'such as blending modes, opac- ity, and fill. With all of their advan- tages, you may never perform adjustments using the Image menu again. When working with adjustment layers, you can modify, merge, or even create a temporary composite image, all while your original image stays intact. The other way is to use an adjustment layer-the very definition of control over time. You could go to the Image menu, and ch-oose Adjustments however, when you apply an adjustment using this method, it's permanent. Photoshop has two ways to apply adjustments to an image. Since adjustment layers are simply a set of mathe- matical data, they do not increase the size of the file. Most Photoshop layers are composed of pixels, so adding traditional layers to a document increases the size of the file. Adjustment layers do not increase the size of a Photoshop document. Another advantage of adjustment layers is size. Since adjustment layers can be saved with the document, you can close the document, then return at a later time to make fur- ther adjustments. Since the adjustment is contained within a separate layer, the original image never changes.This gives you the ability to experiment with different settings. The pur- pose of an adjustment layer is to show how a specific adjustment, such as Hue & Saturation, changes the appear- ance of the image. Working with Adjustment Layers, Filters, and Tools Introduction If you want to visually control an Adobe Photoshop docu- ment, then adjustment layers are the ultimate tool.