I am using the Customizr theme.
In the header there is an element called navbar. When the browser window width is superior to a value the navbar is not collapsed. When the browser window width is inferior to that value the navbar is collapsed.
I would like to change that value.
I haven't been able to locate the piece of code that trigger the change of format. Is it in the CSS file, is it in the PHP files? I can't tell.