Hi @mail8 - For the image thumbnails I ended up using card columns and cards from an external library for Dash called “Dash Bootstrap Components” Card - dbc docs
I provided each card with an id that leverages the pattern matching callback feature as pointed out by @chriddyp earlier on this thread 📣 Dash v1.11.0 Release - Introducing Pattern-Matching Callbacks - #2 by chriddyp
Hope this helps. If you are looking for something more specific - let me know