Images can be added to each course to use in the Tile layout or for thumb nail images for Classic layout. They can be uploaded by going into the Settings sub tab of the course and selecting Choose File in the Course Image section.
Note: Tiles are only available on the learner side. See this article to change your theme.
Note: All tiles in tile view are 250px x 250 px and will be stretched to fit the tile. Images smaller than 250px x 250px will be tiled.