How to control position & order of thumbnails?

Configuration General Questions
1

See the Style option “IconBox”. It accepts a position (a geometry position) defining a known location. Or see the following:

edulinux.homeunix.org/fvwm/fvwmchanfaq.html#21

– Thomas Adam

2

Just to give some extra info:

some info about order of the thumbnails:
viewtopic.php?t=1245

info about padding between thumbnails:
viewtopic.php?t=1030

info about transparent thumbnails:
viewtopic.php?t=1131