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Of course, a 640'480-pixel image would consume an entire 13-inch screen. If you want the image to share the page with text and other elements, the image needs to be smaller than that. A typical screen image varies from as small as 16'16 pixels for icons and buttons to 320'240 pixels for a stand-alone photograph. Naturally, these are merely guidelines. You can create images at any size you like.
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6.3.2 How to Open, Duplicate, and Save Images
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How to Open, Duplicate, and Save Images
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Part I: Welcome to Photoshop
Before you can work on an image in Photoshop whether you're creating a brand-new document or opening an image from disk you must first load the image into an image window. Here are the basic ways to create an image window:
File ® New: Create a new window by choosing File ® New or by pressing Ctrl+N (z -N on the Mac). After you fill out the desired size and resolution specifications in the New dialog box, Photoshop confronts you with a stark, white, empty canvas. You then face the ultimate test of your artistic abilities painting from scratch. Feel free to go nuts and cut off your ear.
File ® Open: Choose File ® Open or press Ctrl+O (z -O on the Mac) to open images scanned in other applications, images purchased from stock photo agencies, slides and transparencies digitized to a Kodak Photo CD, or an image you previously edited in Photoshop.
File ® Browse: The File Browser is a free-floating window that lets you view thumbnails for multiple images at one time. You can toggle it on or off by clicking the folder icon next to the docking well in the Options bar. Additionally, you can bring it up by choosing File ® Browse or pressing Ctrl+Shift+O (z -Shift-O on the Mac). After you find an image you like, double-click it to open it.
File ® Open Recent: A variation on the Open command, Open Recent displays a list of the images that you recently opened. Click an image name to crack open the image file without taking that tedious trip to the Open dialog box. You can set the number of files that you want to appear in this list in the File Handling panel of the Preferences dialog box.
Edit ® Paste: Photoshop automatically adapts a new image window to the contents of the Clipboard (provided those contents are bitmapped). So if you copy an image in a different application or in Photoshop and then choose File ® New, Photoshop enters the dimensions and resolution of the image into the New dialog box. You can just accept the settings and choose Edit ® Paste to introduce the image into a new window. Photoshop pastes the Clipboard contents as a new layer. This technique is useful for editing screen shots captured to the Clipboard or for testing effects on a sample of an image without harming the original.
File ® Import: If you own a scanner or a digital camera, it may include a plug-in module that lets you transfer an image directly into Photoshop. Just copy the module into Photoshop's Plug-Ins folder and then run or relaunch the Photoshop application. To initiate a scan or to load an image into Photoshop, choose the plug-in module from the File ® Import submenu.
After you choose the command, Photoshop launches the device's download software. If you're scanning, select the scanner settings and initiate the scan as usual; the scanned picture appears in a new image window in Photoshop. If you're transferring images from a digital camera, the camera software typically creates thumbnail previews of images in the camera's memory so that you can select the ones you want to transfer to Photoshop.Tip
Save your images to disk immediately after you scan or download them; unlike some other programs, Photoshop doesn't automatically take this step for you. Also, if your digital camera stores images on removable memory cards (CompactFlash, SmartMedia, Memory Stick, and the like), do yourself a favor and invest in a card reader or adapter that enables your computer to see the memory card as just another hard drive. Then you can just drag and drop images from the memory card to your computer's hard drive, a process that, depending on your camera, may be much faster and more convenient than transferring images using a cable connection. Creating a new image
Whether you're creating an image from scratch or transferring the contents of the Clipboard to a new image window, choose File ® New or press Ctrl+N (z -N on the Mac) to bring up the New dialog box shown in Figure 3-3. If the Clipboard contains an image, the Width, Height, and Resolution option boxes show the size and resolution of this image. Otherwise, you can enter your own values in one of six units of measurement: pixels, inches, centimeters, millimeters, picas, or points. If you're uncertain exactly what size image you want to create, enter a rough approximation. You can always change your
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63 Photoshop CS Bible @Team LiB