Reply To: Increase body width/decrease sidebar width

@liora: If you are looking at the width like Catch Kathmandu Pro theme, then you can add the following css in “Appearance => Customize => Theme Options => Custom CSS Options” box:

@media screen and (min-width: 1024px) {
	.site {
		width: 100%;
		max-width: 1280px;
	}
	#primary {
	    width: 70%;
	}
	#secondary {
	    width: 27%;
	}
}