Step 1: Right click the image that needs to be resized.
Step 2: From the menu select Open with > Preview (Default)
Step 3: Go to Tools menu > Select Adjust Size
Step 4: In the Adjust Size window, you can change the width and height. We recommend keeping the “Scale proportionally” button checked, or you will have a distorted image after resizing. For “width”, enter 600, which is the minimum amount. The width and height must be at least 600 pixels.
Click “OK” button to resize the image.
Step 5: Go to File menu > Select Save, that overwrite the image with a new adjusted size. Now the image is ready to upload to your listing.
