I have tried to follow the Stay theme instructions and have:
1. Added a new page with no parent, the Home template, order 0, no featured image
2. Added 3 new pages (named: slider page 1, slider page 2, slider page 3) with no parent, the Default template, order 0, and each with a featured image 1200px wide
3. In Appearance, Customize, Home Slider, set Featured Page 1 = slider page 1, Featured Page 2 = ...
However my page with the Home template does not display the featured page slider.
There are no other pages apart from these four. I don't know where the "while ( $slider->have_posts() ) : $slider->the_post();
" code refrerred to in Gabrielle Green's post a month ago should be - my Home template page has no code at all.