1. Select two images. The images must be uploaded to the internet (have their own URLs), or saved in Dropbox.
2. On https://juxtapose.knightlab.com/, enter the URLs to your images, as well as optional labels and image credits, and click Publish.
3. The site will provide you with a share link, and an iframe embed code. Copy the code and paste it on your web page.
Additional directions, FAQs, and help are available on the Knight Lab website.