Portfolio problem

Hello,

need help with theme.

1. Can’t remove white border around pictures on portfolio. I want it to be like on demo but when I uncheck option “Add white spaces between images”, images stick together without any space between them.

2. When I add 3 columns in a row (width 15%,70%,15%) it breaks on ipad. So now we have only one column but we don’t want it to be full width.

How to make portfolio like on demo? We want exact one – without white space and not full width.

Thank you!