Adding a social sharing image to your Nucleus is super simple!
In the main menu of your Dashboard, select Settings.
Next, on the left hand side click Homepage.
Finally, scroll down the the bottom to where the social sharing image section is located.
Click to add an image and make sure the size is 1200x630 pixels or larger for best results.
Sharing a Nucleus link on Facebook:
If after you have uploaded your social sharing image it is not showing up on Facebook, here is how you can fix that problem. They cache the sharing link results for a long period of time. For instructions on how to manually refresh the cache for your page, click here.