what is the use of Resize Graphic output area ?
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Answer:
Ans- You can resize and crop images several ways using Photoshop. To achieve best results when cropping or resizing images, it’s useful to understand the concepts behind resizing methods and how resizing affects crop.
For instructions on how to resize photos, see Image size and resolution.
For instructions on how to crop photos, see Crop and straighten photos.
Image sizes onscreen and in print
The size of an image when you view it onscreen is different from its size when you print it. If you understand these differences, you can develop a better understanding of which settings to change when you resize an image.
Screen size
The screen resolution of your monitor is the number of pixels it can display. For example, a monitor with a screen resolution of 640 x 480 pixels displays 640 pixels for the width and 480 pixels for the height. There are several different screen resolutions you can use, and the physical size of the monitor screen usually determines the resolutions available. For example, large monitors typically display higher resolutions than small monitors because they have more pixels.
To find out what your screen resolution is, choose Start > Control Panel > Display > Settings and look at the screen resolution (Windows), or choose System Preferences > Displays and look in the Resolution list (macOS).
Image size onscreen
Images are of a fixed pixel size when they appear on your monitor. Your screen resolution determines how large the image appears onscreen. A monitor set to 640 x 480 pixels displays fewer pixels than a monitor displaying 1024 x 768 pixels. Therefore, each of the pixel on the 640 x 480 pixel monitor is larger than each pixel displayed on the 1024 x 768 pixel monitor.
A 100 x 100-pixel image uses about one-sixth of the screen at 640 x 480, but it takes up only about one-tenth of the screen at 1024 x 768. Therefore, the image looks smaller at 1024 x 768 pixels than at 640 x 480 pixels.
Image size in print
The other values used in resizing images—the physical size of the image when printed, and the resolution—aren't used until the image is printed. Then, the physical size of the image, the resolution, and the pixel dimensions determine the amount of data in the image and its print quality. In general, higher resolution images print at a higher quality. See the sections that follow for more information on resolution and physical size.
Image Size dialog box
When you use the Image Size dialog to resize your images (choose Image > Image Size), four aspects of your image can change:
Pixel dimensions: The width and height of the image.
Image size when it's open in Photoshop: This value appears at the top of the dialog box.
Document size: Physical size of the image when printed, including a width and height.
Image resolution when printed: This value appears in pixels per inch or pixels per centimeter.
Photoshop calculates the physical size, resolution, and pixel dimensions of an image as follows:
Physical size = resolution x pixel dimensions
Resolution = physical size / pixel dimensions
Pixel dimensions = physical size / resolution
The Image Size dialog allows you to resize your images in two ways. You can increase or decrease the amount of data in the image (resampling). Or, you can maintain the same amount of data in the image (resizing without resampling). When you resample, the image quality can degrade to some extent. You may have to do some extra work, such as using the Unsharp Mask filter to sharpen your image, to compensate for the resampling.
Tip: To reset the Image Size dialog to its original state, press Alt (Windows) or Option (macOS). Pressing these keys changes the Cancel button to a Reset button.
Explanation:
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