Hello. In today's lesson, you'll learn more about the Adjustment Brush, which is a very powerful and flexible tool for making precise adjustments to select portions of your image. To access the Adjustment Brush, click on the brush icon at the top far right. The brush panel expands to show the many options available for localized adjustment. A plus sign symbol icon allows you to create a brush. Multiple brushes which adjust or modify different portions of the image can be created as needed. The brush size slider is visible, but if you twirl down the small triangle symbol at the right, it reveals additional brush option. Feather allows the edges of the brush to contain semi-transparent pixels which creates a softer edge. Flow controls the rate of buildup as the brush strokes are applied by percentage. 100% applies the brush stroke with full strength, lower settings build up the effect more gradually. Flow controls the rate of buildup as the brush strokes are applied by percent. 100% applies the brush stroke with full strength, lower settings build up the effect more gradually. Density affects this as well. It's as if you loaded up the brush with a solid load of paint at a hundred percent versus a more diluted paint load at lesser percentages. Once you move your mouse into the image the double circle appears with a plus sign in the middle indicating you're about to add a brush to paint in some of the many adjustments available. The outer ring of the brush circle indicates the degree of feather being applied. The greater the gap between the inner and outer circle, the greater amount of feather as you can see here. This is easily modified with the feather slider prior to application of the brush as well as flow, density and size. I prefer to use a keyboard shortcut to adjust brush size, however. The left bracket key next to the P key on your keyboard reduces the brush size every time you tap it and the right bracket tap will increase the size. If you want to begin with a more gradual buildup of your intended adjustment, you can start with the default setting of 50% for flow. With a density of a hundred. Checking auto mask will allow Lightroom to try and detect edges and tonal changes in the image and automatically limit your brush adjustment applications to a selected area. Here I will apply an adjustment using auto mask initially selecting only the texture slider. As I brush it on you can see, I could still adjust it using the texture slides afterward. A blue dot inside a circle appears in the image. This is called a pin and it indicates a specific brush adjustment is active. Hovering my mouse over the pin reveals a red overlay to indicate the mast area affected. If desired I can add other adjustments to this brush with a slider. Here I've added temp and tint adjustment to the brushes adjustment. If I wish to remove all or part of my brushed in effect, I can click on the eraser icon and now the brush circle icon displays a minus sign. If I bring the flow slider up to a hundred it erases the effect fully wherever I brush. You can create multiple brushes that make different adjustments over the select portions of the image. Return to the plus icon and make a new brush. This can have completely different size, feather, flow and dense. This can have completely different size, feather, flow and density adjustment auto masking on or off as well as different settings for the rest of the adjustments sliders available. Double clicking on any slider returns it to the default setting. Clicking the image reveals a second pin which is the new brush. A white dot inside it indicates that it is the brush you have selected. For this brush I've moved down to the hue slider and chose find adjustment. Selecting a hue with the circle inside the color picker bar, I painted on the image with a full flow setting. With auto masks switched on, the color is only applied to areas of similar color in the image. Switched off, it applies the color mainly wherever I paint. From here of course I can add any other adjustments to this brush, erase the effect or add another brush if desired. If I wish to eliminate a brush, now send to the image select that pin and tap the delete key. At the very bottom of the panel there is a colorize option. To use it, click on the rectangle with a red diagonal line running through it. This expands a color picker. Mouse around inside the color picker to choose a color. Add a brush and paint in the color anywhere in the image you choose. Move the circle inside the colorized picker to change the color or saturation of that color as desired. Click on the switch next to the color swatch rectangle to turn off the colorized option. Reset sliders automatically if check should reset them as you add new brushes. And of course you can go to the top right here and you can simply undo or reset all your settings. In this lesson you've learned about the many options available when using the adjustment brush, how to apply them, add to them or remove them by erasing or completely eliminating brushes. Thanks for watching. In the next lesson we'll examine making local image adjustments with the linear gradient which is another powerful tool for precise image processing. Let's check it out.