Resample Image: This has to do with the amount of detail saved in your image. If this box is not checked and you increase the image width, your image will come out looking stretched. Scale Proportionally: Check this box if you want the image proportions to stay the same as you resize your image. Next, click the resize icon.Ģ.There are two checkboxes that you should set before resizing your image. Other times, you may need to reduce the resolution of a group of photos to make the file smaller so that they can be emailed. All these tasks are easily accomplished using Preview, Mac’s default application for viewing images.ġ.Open the image in Preview, and open up the Markup Toolbar by clicking the toolbox icon from the main toolbar. Sometimes, you need to adjust a photo’s dimensions to get it ready for printing.

To save the resized photo as a copy (so that your original photo is not affected), click File > Save As in the menu bar.You might find you need to resize an image for many reasons. If this looks good to you, click File > Save in Photoshop’s menu bar to save the photo. Your photo’s resized version will now appear on your screen. Then, click “OK” at the bottom of the “Image Size” window. Similarly, to change the height of the photo, click the “Height” field and enter a value. To change the width of your photo, click the “Width” field and enter a new size. Now comes the part where you resize your photo. But if you want to disable it, click the chain icon between “Width” and “Height” so that the little lines that point to “Width” and “Height” disappear. Generally, you should keep the aspect ratio so that your photo doesn’t look weird.

Photoshop will automatically change the value of the other field based on the existing ratio. If you choose to keep the image’s original aspect ratio, you only need to change the value of either “Width” or “Height” for your image. The aspect ratio is the proportional relationship between the two sides of the image (width and height). Next, decide whether you want to keep the aspect ratio of the original image. Many people use “Percent” for eyeballing relative size changes, but if you’re resizing images for the web, you’ll probably want to choose “Pixels” from the list.

Columns: This lets you resize by the number of columns, an arbitrary unit defined in Preferences > Units & Rulers.

Picas: One pica is equal to 1/6th of an inch or 12 points, and it’s used most frequently in design for print.

In a 72-DPI resolution image, one point is equal to one pixel.

Points: A point is a unit of measurement common in typography that is equivalent to 1/72nd of an inch.

Inches, Centimeters, Millimeters: These are standard measurement sizes that only apply when an image is printed, and they are related to the image’s DPI.

Pixels: This lets you specify exact pixel dimensions for the resulting image size.

For example, using 50% as the target image size makes the image half of its current size.

Percent: This lets you resize by a percent of the current image size.

If you click the drop-down menu beside the “Width” or “Height” fields, you can choose the unit type. In the “Image Size” window, first, you’ll want to decide what measurement unit you’ll use to resize the image.

Resize image on mac