When you create a course on Eduflow, your course will automatically start with a random course thumbnail. Here's an example:
To change the course thumbnail, hover over the thumbnail picture and a button will appear to "Edit thumbnail" and choose one of the following options:
You'll also find these options in the Course settings menu by clicking the ellipsis icon next to the course name.
Course thumbnails have default dimensions of 462 x 240 px. Your image will automatically be centered without stretching the image. You can crop or resize images to fit those dimensions if you want to avoid cutting off the ends of your image.