ubunti Why does the setting ask for the width and shape of the image in the slideshow?
Upon reviewing, I can see option to add custom height for dimensions solely, in module parameters for "slideshow-backstrech" layout type. Ref: Screenshot
As also mentioned on the demo site info page - "resizes the height or width to retain the aspect ratio as much as possible" and also elaborated here so the main purpose of backstretch type is to stretch any image to fit the page, and automatically resize as the window size changes which can also be seen currently with the specific layout