So simple - make adjustments to exposure/contrast size position crop et al - they do not show on the timeline and do not appear in the slideshow.
Whereas using the same set of clips (jpgs) and just play as a normal video and the adjustments do appear in the preview, even though not on the timeline.
So timeline display does not show any changes - but maybe this is how CL designed it.
Slideshow ignores changes - and this is bad, as regular video uses changes as made.
Any thoughts peoples?