Often you want to use images from iStock in your visuals as temporary placeholders, before you get client agreement and buy the proper image.
iStockPhoto has a zoom function that lets you view a larger version of the image. This involves a targeted click on the centre of the image, and further clicks if you wish to save the large comp to your computer. In most instances it's not possible to view this zoomed image at its full size, or easily download it for use in your designs.
This extension adds a simple "Download large comp" link, styled as a green button, that points directly to the zoomed image.
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