On the front page settings, there is a summary box - can put a graphic in the box. The directions say "This summary can be displayed on the front page using the course/site summary block." Where is the course summary box?
Tom, you have to ADD course summary block.
No, turn this setting on (as per the previously posted link: https://docs.moodle.org/39/en/Front_page_settings#Include_a_topic_section) ->
Then you'll be able to add any module, i.e a label to contain your image, when editing is on: