There are a few different features that can adjust the alignment of a slideshow section. These features can be adjusted at the section level for the types slideshow and full slideshow.
The three features are:
'Enable full height slideshow' - Stretches the subsections to match the height of the window.
'Slideshow Alignment' - Select one of the options (Top, Middle, Bottom) and the content will move to that selection on the page
'Disable adaptive height' - Allows all subsections to be the height of the tallest subsection, which stops the page from jumping when sliding left and right
Points to Note:
Not all subsections will be affected by the 'slideshow alignment' there are a few that have defaulted height and placements
The height features are checked by default when the types slideshow and full slideshow are selected. Any posters created before the release will need to check these options if required.