How to make a page extend full screen [closed]

Do you understand the bootstrap framework at all? Your theme has implemented a column width that is smaller than you would probably like.

Your content area is wrapped in an offset column that is 50% of the container width.

<div class="col-lg-6 col-lg-offset-3">
    <!-- content -->
</div>

If you want to increase the width of your container you’ll need to change the class declaration on that div and remove the offset. The following will make the container 100% of the container width with no offset.

<div class="col-sm-12">

Its possible that your theme has options to affect this. I would be looking there first.