Tham khảo tài liệu 'professional information technology-programming book part 24', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter 6. Nondestructive Overall Adjustments The workflow organization of this book is about maintaining nondestructive editing in as many ways as possible for as long as possible. So when it comes to making post-RAW or non-RAW overall adjustments you want to start by doing them with adjustment layers. That s because an adjustment layer doesn t actually do anything at all to the image itself. The adjustment layer simply passes on a text description to Photoshop to display the image in certain ways. You can even go back to that layer and change those instructions at any time. But you say what about all the Image Adjustments commands that are not available as adjustment layers Do not use them until I tell you to that s all. When that time comes I ll show you a keyboard shortcut Action alternative that will place the effects of those commands on their own layer so they don t affect your previous work. Of course there s no written law that says that you can t do these things in any order you like. On the other hand the whole point of this book is to discipline you to sequence your work so you ll never have to recreate any more of an image than is absolutely necessary to make the desired change you want to make. Adjusting on Adjustment Layers Once you ve done your spot retouching and lightened or darkened burned and dodged with the 50 percent gray layer it s time to adjust your image. You ll probably want to make adjustments at this stage whether you re working on top of adjustments you ve already made in Camera Raw or starting from scratch because your camera shot a JPEG or TIFF image. Also if you made adjustments in Camera Raw you ll be happy to know that there are even more overall adjustments that can be done only in Photoshop. This chapter only discusses the adjustments that can be done on adjustment layers because they are completely nondestructive. In Chapter 12 I ll show you how to make destructive adjustments on a separate layer. . Adobe Lightroom On the .
