Go to: The course / Edit settings
Course summary:
The course summary is displayed in the list of courses. A course search searches course summary text in addition to course names.
Displayed images in courses list:
Course summary files: Course summary files is the images that is displayed in the list of courses together with the summary, when you are logged in Growdly.
The best format is to upload images file with width = 405px and height = 270px.
We recommend Web-tool https://pixlr.com/web to edit existing images.