The first one, Scale Styles, has to do with Layer Styles and how they're affected by resizing or resampling the image.
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For that, we'd have to change the resolution to at least 240 pixels per inch, while 300 pixels per inch is considered the professional print standard.īefore we go any further, there's three more options in the Image Size dialog box below the Document Size section: If you've read the section on how print resolution affects image quality, you'll know that even though we'd be getting a very large image when we print the photo, a resolution of only 72 pixels per inch is simply not high enough to give us anywhere near professional image quality with our prints. The Document Size section is showing us what the current print resolution of the image is, which in this case is 72 pixels per inch, and it's showing us how large the image will print at that resolution, which at 72 pixels per inch will give us an image that's 48 inches wide by 32 inches high. Now let's look at the Document Size section: That's a combined total of nearly 8 million pixels (the camera used was an 8MP camera, hence the 8 million pixels in the photo), which gives us lots of image information to work with in Photoshop. We can see here that the photo is quite large, with a width of 3456 pixels and a height of 2304 pixels. Let's take a look at the Pixel Dimensions part of the Image Size dialog box to see exactly how large our image is, in pixels. You can think of the Pixel Dimensions section as the section you'd want to change if you were working on an image for the web or simply to display on your computer screen, while the Document Size section is used when you need to control how large your image will print. The Document Size section tells us how large or small our image is going to print based on the image resolution, which we also set in the Document Size section. The Pixel Dimensions section tells us the width and height of our image in pixels, and also tells us the file size of our image. To access it, I’ll go up to the Image menu at the top of the screen and choose Image Size:Īs mentioned previously in the " Image Resolution" and " Image Resizing" sections, Photoshop's Image Size dialog box is divided up into two main sections - the Pixel Dimensions section on top, and the Document Size section below it. Let’s look at what the Image Size dialog box is telling us about this image. Resizing vs Resizing An Imageįirst, we need a photo. Let's look more closely at the difference between resizing and resampling. And assuming you don't want Bob to like you much anymore because you think you know it all. See? You already know enough so that the next time someone refers to changing the number of pixels in the image as resizing the image, you can look them proudly in the eyes and say, "I think what you really meant to say there, Bob, is that you're going to be resampling the image, not resizing it." Assuming, of course, that the person's name is Bob.
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If, on the other hand, you are physically changing the number of pixels in the image, that's called resampling.ĭownload this tutorial as a print-ready PDF! Plus get exclusive tutorials!Īgain, just to make sure we're on the same page so far: If you're keeping the number of pixels in the image the same and simply changing the size at which the image will print, or in Photoshop terminology, changing the document size of the image, that's known as resizing. The difference between resizing and resampling has to do with whether or not you're changing the number of pixels in the image, or as Photoshop calls it, changing the pixel dimensions of the image. There's an important difference between the two.Īs we'll see in this tutorial, the difference, as important as it is, is controlled by nothing more than a single checkbox option at the bottom of the Image Size dialog box.Īs I just mentioned, the choice of resizing or resampling your image is handled by the Image Size dialog box, which can be found under the Image menu at the top of the screen. A lot of people use the terms resizing and resampling as if they mean the same thing, but they don't. You can either resize the image, or you can resample it. When changing the size of an image in Photoshop, there's really two ways to go about it.
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