I'm having trouble with the overlay I want to set over my image. It seems to be covering my entire background and I can't figure out why. Can someone please assist me?
<header class="main_head">
<div class="navigation">
<nav class="navbar navbar-default">
<div class="container">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">LOGO</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<li class="active"><a href="#"> Home <span class="sr-only">(current)</span></a></li>
<li><a href="#">About Us</a></li>
<li><a href="#">Services</a></li>
<li><a href="#">Sign Up</a></li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
</div>
<div class="main_info">
<h1>Lorem Ipsum</h1>
<p class="lead">Lorem ipsum dolor sit amet, consectetur.</p>
<button type="button" id="odd_btn" class="btn btn-primary btn-lg">Primary1</button>
<button type="button" class="btn btn-primary btn-lg btn-spread">Primary</button>
</div>
</header>