Tried to work out how to do this
Put text to bottom of slider
Change background of text caption to @linkColor
Remove button and add link to Caption text (Ok this needs some coding - so leave for now)
Can't seem to nail down a specific selector to change the position or the background colour of the caption.
Or adjust the position of the button.
Nothing in the documentation, and the More Info button link in the Slide Editor Section goes to a third party site that has examples - but these all override the DMS interface and CSS.
Frustrating start. Advice appreciated.