These templates go at the top of pages. They are usually placed to show that a page needs work, and as such, some are only visible to those who change their user CSS to make them visible. This can be achieved by going to Special:Mypage/BlueCloud.css and adding the following CSS:
/*<pre>*/
.developer_header_box
{
display: block;
}
/**/
Pages in category "Header box templates"
The following 35 pages are in this category, out of 35 total.