Once the desired area is selected, use your delete key to remove it. You will see areas of the image changing color to indicate your selection. Once you have selected “Instant Alpha” from the markup toolbar (it’s the icon that looks like a magic wand), simply click and drag on the image’s background. Preview also offers the “Instant Alpha” tool.
From there, it is a quick click of the delete button, and you are left with just your object and a transparent background. To remove the background, you can go to “Edit” and then “Invert Selection,” and this will select everything except your object.
The program then uses that outline to determine where the border is between your object and the background, and selects the objects. This tool allows you to draw around your object with a fairly blunt outline, and thus, fairly quickly. Your first option is to use the “Smart Lasso” tool. Inside the program, your tools for removing the image’s background can be found under the “Select” dropdown menu by clicking the icon in the top left of the markup toolbar. If you’re a Mac user, you probably use Preview all the time, but you might not know that it can edit images and remove backgrounds too.
Preview is a native Mac OS X application used to load images and PDFs. Photographer Jeff Delacruz shares how you can create your own photo studio and take beautiful product photos for less than $50. Shopify Academy Course: Product Photography