How to extend margins of a container


I’m trying to build out a glide pages application that takes up most of the width of the screen. I’m using multiple 3 column containers with collections in them and there is just so much wasted space on the left and right margins and having the containers extend to fit that space would be incredibly helpful for my project. Is there a simple way to do this that I’m missing? Is this something I would have to upgrade to be able to use custom CSS for?

Thanks for any help!

Can you give us some screenshots of your current configuration?