Using a banner slider from the Quest website theme, how would I go about having full control over the banner height? Under module settings I'm able to see two options for banner height - normal and full height, however I'd like to have more flexibility over this aspect of the element.
Is there an easy CSS class selector or DC selector I can implement?
if the module is editable in the design-manager you can search for the banner-height option, add a new select to it like "custom" and a number-field("custom height") and put this code into the module.html area
Quest is a marketplace theme so the module won't be immediately editable. You will need to create a child theme, copy the module over and create the custom fields per Anton's instructions.
You're also probably going to want to set a different height for mobile than for desktop, so maybe set up a second field for that and use a media query in your css.
if the module is editable in the design-manager you can search for the banner-height option, add a new select to it like "custom" and a number-field("custom height") and put this code into the module.html area