I have a responsive theme in my wordpress site (jax lite theme), with masonry layout. It uses col-md-\* classes, by this way, it displays usually 3 columns for laptops and desktop screens, and only one column for mobile devices.

The problem is that in desktop large screens, that 3 columns leave a big space idle around them. I hate webpages that do not use the entire screen space. I want to use col-lg-\* or col-md\* classes to do this. For example, I want that in a large screens, it displays 4 or 5 columns, or even 3 wider columns too.

I have got this code in template.css:

```html
.post-article .container-fluid .col-md-12,
.post-article .container-fluid .col-md-6,
.post-article .container-fluid .col-md-3 {
 margin-bottom:25px;
}
```

¿How can I do?

Thanks a lot!