In this video, we show you how to get the dimensions of any image on your website in Chrome and Firefox, then use the free online image editor Pixlr.com to size and crop your images to the needed sizes before uploading them. This video shows the details of actually uploading your images to your website slider. For an abridged version of just using the Pixlr editor to size/crop images, view the second video below.
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The abridged video below shows quickly how to find the dimensions of an image on your site, and then size and crop a new one for replacement using the free online image editor, www.pixlr.com/editor