Hello to all

I installed the simple image gallery plugin  for free vers. but I look all the thumbnails in a vertical column below each other, while in all the examples on the network are seen in horizontal groups of 3 or 4 figures and parameters there is nothing that gives the possibility to change the arrangement. Where should I act? What can I do?
Many thanks to everyone who wants to help me.  ??? ???

You should modify the css of the SIG PRO template you use.

I got the same problems as you are.