Add photos via the big-photo popup in Browse. Click a photo
here then a slot to place it - or click any slot to pick. Click a filled
slot to change/clear it. Each design tab keeps its OWN casting -
switch tabs and the tray reads fresh for that design. The header
filters (genre, scene, age, years, lightβ¦) work HERE too: they narrow
the tray + picker, and placed slots glow green (match) or dim (no match).