TAILIEUCHUNG - Photoshop 6 for Windows Bible- P5

Photoshop 6 for Windows Bible- P5:If you are reading this foreword, it probably means that you’ve purchased a copy of Adobe Photoshop , and for that I and the rest of the Photoshop team at Adobe thank you. If you own a previous edition of the Photoshop Bible, you probably know what to expect. If not, then get ready for an interesting trip. | Chapter 3 Image Fundamentals 85 File formats represent different ways to save a file to disk. Some formats provide unique image-compression schemes which save an image in a manner that consumes less space on disk. Other formats enable Photoshop to trade images with different applications running under Windows or some other platform. The native format Like most programs Photoshop offers its own native format that is a format optimized for Photoshop s particular capabilities and functions. This .psd format saves every attribute that you can apply in Photoshop including layers extra channels file info and so on and is compatible with Versions 3 and later of the program. Of course when you open files in earlier versions of Photoshop you lose file attributes related to Version 6 features such as annotations color proof options and so on. Tip Perhaps not surprisingly Photoshop can open and save more quickly in its native X format than in any other format. The native format also offers image compression. 1 Like TIFF s compression the Photoshop compression scheme does not result in any loss of data. But Photoshop can compress and decompress its native format much more quickly than TIFF and the compression scheme is better able to minimize the size of mask channels as explained in Chapter 9 . The downside of the Photoshop format is that relatively few applications other than Photoshop support it and those that do don t always do a great job. Some applications such as CorelPhoto-Paint and Adobe After Effects can open a layered Photoshop image and interpret each layer independently. But most of the others limit their support to flat Photoshop files. To accommodate these programs you can either 1 deselect the Layers check box in the Save dialog box to save a flattened version of the image or 2 activate the Maximize Backward Compatibility check box in the Preferences dialog box. However I intensely dislike both of these options. In fact you should be sure to turn off File .

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