Posts in sidebar, images in columns

Yes, you have to edit the code and style for display images line up into two columns.

I’m very new to this and have never written code before. I’m looking for something I can copy and paste in if somebody can help.

Thanks.

are you using this plugin https://en-ca.www.ads-software.com/plugins/posts-in-sidebar/ ?
if yes, you could ask in https://www.ads-software.com/support/plugin/posts-in-sidebar#postform to get plugin specific suggestions.

can you post a link to your site to illustrate the posts layout?