Images in the map will not only make the map visually appealing, but it is also a great way to create empathy for the customer. In Custellence, adding pictures to your map is easy. We recommend you to use the sub-lanes and sub-cards for images, but you can put them in the regular cards as well. Here is how to upload an image to any card:
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Open a card, and click on "attach image" in the card editor. Then choose your image and click "upload".
There you go, the image will now appear on that card. 

For tips on optimal size and format, check out this article