Have calendar date range or clock time conditions for showing a different set of slides.

Be able to ID specific screens or group of screens and assign a specific slideshow to them.

Instead of my convoluted attempts to graphically show when images aren't the right size, set up detection and warning.

How are we even doing image uploads?

Be able to make the whole show (and thus each slide in it) go by slower or faster.

Don't want Michael getting into it.

Change the display duration of individual slides or sets of slides to pace the visual story.

Jan will want to tell a story with the order

Such as by ghosting?

Ability to put a slideshow "on ice" for a while rather than delete it entirely.

May dovetail with or be superceded by calendar date range / clock time feature.