Click on “File” at the top and select “Save All.” The images in Preview will instantly resize to your desired resolutions.If you wish to resize only one dimension, say the height, be sure to select “Scale Proportionally.” Otherwise, you’ll end up with images that are scaled disproportionally. To use these, click on “Fit into,” and then select the dimensions you want from the dropdown box. The app also allows you to select the most common, predetermined dimensions. Proceed to enter your desired width and height values.Click on “Tools” and then click on “Adjust Size.” This will launch a new window where you’ll be prompted to enter various details about the images.To do so, click on “Edit,” and then “Select All.” In Preview, select all the images you’d like to batch resize from the left side thumbnail drawer.You can even refine your images further by removing any items you may have selected by mistake. You can scroll through the list to view specific items in the main panel. To do so, select all of the images, then right-click, and then select “Open with” and click on “Preview.” At this point, Preview will display all the images selected on the left-hand side thumbnail drawer. In Finder, click on all the images you’d like to resize and then open them with the Preview app.Preview is a powerful yet easy-to-use software that’s designed to resize multiple images in one fell swoop. How to Batch Resize Images on a Mac With Preview

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