Changing percentage width does nothing

There’s not actually anything to see…nothing changes. I just am playing around, trying to see how things work. Still brand new, learning how to tweak things. I know that I am supposed to be able to adjust these things:
Width of listing right section
Width of listing content section
Width of listing left section
Width of home right section
Width of home content section
Width of home left section

I also see the same fields in author and search…I assume if I fiddle with those I will get the same lack of results.

Any numbers I put into any of these fields…and I’ve played with this quite a LOT. Does nothing. Nothing changes, even a little. Nothing happens.

I am using the Supreme Directory theme, so I don’t think it’s a theme compatibility issue.

I’m not actually trying to DO anything at this point…just wanted to see what I can change and see what it would look like. Just playing. Also wanted to see exactly what was considered “content” section by making changes. But since nothing is changing, I am still unsure.

Just would like to know why I am unable to actually tweak anything using these fields. If I have something set wrong or if there’s a glitch or what?

Ok, I think I got it. I only had widgets in the content section. I put some in the sidebars of the homepage and played around some more with the numbers and now things are moving around. YAY! It works!

Thank you!