You need to be on LearnDash v3 – if you are not and you are going to upgrade PLEASE take a backup of your site first, and ideally try this in a test environment .
(If you are serious about running a successful business online you should be using a host that providing fast one click backups and staging environment. We use Kinsta who do both of theses perfectly.)
In LearnDash 3 under Settings you need to set Active Template to LearnDash 3.0 (if you upgrade by default you will be using Legacy). Once you switch will see the Focus Mode options. Then you just turn it on and pick some colours and a logo.
I started looking at LearnDash Focus Mode for a client. At first everything looked great – so much better than the legacy view. But then my client pointed out that the featured images set on lessons and topics were missing. These were an important part of the ascetic of the courses, and my client definately did not want to have to go through all the content adding the images inline. They also had some videos on the site that were added using the Avada Theme video embed option, and these were also missing.
Raising a support ticket with LearnDash gave little joy – after waiting several days for a reply, we were told that there was no way to turn featured images back on. I assumed that meant no way within the LearnDash settings, and started digging into the code. Here’s what I found:
In this case I wanted the featured images to be displayed within the content wrapper, so rather than using the actions, I added a filter to the WordPress the_content filter.
You just need to add this code to your functions.php file: