Quick tip! Facebook loves images that have the magic width of 2048 pixels. If we keep Resample checked on, we will alter the pixel width/height of the image, but if we shut Resample off, we can adjust the print size of the image via the resolution, but not alter the pixel dimensions of the image. (Most prints are at least 150 pixels per inch and typically max out around 300 pixels per inch.) Resampling is actually what controls whether or not we change the pixel size of the image. High resolution = smaller physical print, but greater/more crisp details the higher the resolution. The resolution input field allows us to change the target resolution of the image and affect the physical size of the image if we were to print it out right there from Photoshop. Resolution and Resampling with Image Size TIP: Click the little chain icon to make sure that you are scaling the image proportionally. We also have our main input fields below that which we can use to set a width and height for the image resizing.
You can use the “Fit to” drop down menu to choose a specific preset size to change the size of your image to fit within. This is the most powerful way to resize an image. Go Image>Image Size to bring up the image size dialog box. Go Image>Crop to crop and resize your image. Click anywhere in your image and drag to place that selection wherever you want it to be. Grab the Rectangular Marquee tool (M) and look to the top control bar and choose “Fixed Size” from the drop down menu and set a width and height. Grab the Crop tool (C) and look to the toolbar across the top of the screen and punch in the width and height of the newly cropped image and Photoshop will both crop and resize your image when you hit the little check icon.