I tried to include a custom header in a standard SharePoint 2013 masterpage (“Seattle”), unfortunately, the new content header was showing up in every dialog box too. I found a quick and easy work-around to prevent the custom code from being rendered. Just wrap the whole custom code in a div tag and add a class called “s4-notdlg” to that div – works like a charm!
<div class="s4-notdlg"> ..custom code... </div>Image may be NSFW.
Clik here to view.
