CHAPTER 34 IMAGE ADJUSTMENT AND CORRECTION You can adjust images in Canvas using built-in filters and third-party plug-ins. For example, you can use the Levels filter to adjust image highlights and shadows, and sharpen scanned photos with the Unsharp Mask filter. This chapter describes the commands you can use to adjust image color and brightness. It also describes commands for sharpening, softening, and refining images. Applying image-editing commands You can apply most image-editing commands to a single paint object if it’s selected or in edit mode.You can also apply most commands to multiple selected paint objects. You can set image modes, apply fil- ters, and adjust settings for multiple paint objects at the same time. In most cases, a command affects an active selection, or an entire image if nothing is selected in edit mode. Note: When you apply an image-editing command to more than one selected paint object, you can’t use the Preview option if the dialog box has it. Preview is available when a single image is in edit mode. The following summarizes how image-editing commands can be applied. •   Mode commands let you set the image mode for one or more selected paint objects. •   You can convert multiple objects to image proxies. •   The Crop command and the Proxy Info command can’t be applied to multiple objects. •   The Resolution command sets the resolution for one or more selected objects. •   The Trim command trims one or more selected paint objects. •   You can apply filters to one or more selected paint objects. If a single paint object is in edit mode, a filter applies to the entire image or an active selection.
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