hello Natali and thanks for your help.
Sometimes I create photo albums, that my older collegues also check out.
lot of them have old computers with small monitors.
right now I use small thumbnails, but using medium sized thumbnails, with less columns would look better (at least for me).
maybe the older collegues would also prefer the bigger, clearly visible thumbs.
It's not a major issue but could be a useful feature.
PS. my monitor is wide enough.
otherwise the program is easy to use, looks great, templates are cool...