I have been researching the forums while waiting for someone to help and came across this thread/post
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Full-Width Featured Content Slider
Focus on your favorites with the graciously sized, full-width Featured Content Slider. To setup, choose a featured post tag in Settings -> Reading -> Featured Content, set a featured image on your favorite posts and tag them with the featured tag.
When I go to Reading settings in my dashboard, there is no Featured Content option any more. Has this been removed from the Blissful Blog theme? And if so, was it just today? I've been using this theme for a year maybe now and it went missing one other time before but only for a few moments. It's been gone since this morning.
How can I get staff to look at this post please?