Hi developers,
In this Article, I will describe about WPL28 custom header and how to use it:
WPL28 theme has a new type for developers. This type doesn't have any content so you can add your desired content for the header.
First of all, You need to make sure you already have wpl28 child theme activated. In child theme, You should copy header.php of theme from "\wpl_twentyeight\header.php" to "\wpl_twentyeight-child\header.php".
Search for "case '10':" in header.php in child theme, There is a comment section under this part " // Add your custom header codes in here. (Important: You should use this customization in child-theme) ". You should add your codes in here. 

As I already mentioned before, This type is useful only for developers who can customize a WordPress Theme so if you are not a developer we don't recommend you to do any of this changes.

          ...
                   <?php
                break;
          case '10':
                    // Add your custom header codes in here. (Important: You should use this customization in child-theme)
                break;
          ...