Remove the top margin of header in bootstrap

For Bootstrap 3 just add class "media-heading"

<h1 class="media-heading"><font>ABC Company</font></h1>

give your h1 and page header a margin-top of 0 and make sure your body doesn't have any padding:

body { padding: 0; }
.page-header,
.page-header h1 {margin-top:0;}

Example bootply

If you need your h1 to move down a bit, then give it padding-top

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