To add an image to your FormSketch map, either to point out an area with a photo, or for drawing over, in the Drawing tool select the Menu dropdown in the top left > Upload Media. You will then select a saved image (from either your PC or mobile device, depending on where you're creating / editing your map).
You can also add an image / asset with the menu at the bottom of the tool:
Once you've selected the image, you can then change the size and move it around to wherever you want it to be. You can also use it as the background for your drawing tool, so that you can mark out spots on a satellite view of a property, or in a floor plan.
