4D v13 has a new 4D HTML Tag called #4DELSEIF. This can be used to create a case statement in HTML pages. Without the #4DELSEIF tag this could only being done using a series of nested #4DIF tags. For example the following two sets of HTML code, one using nested #4DIF tags and one using #4DELSEIF have identical results.

<!--#4DIF LoggedIn=False-->    <!--User is not logged in, display login page-->    <!--#4DINCLUDE Login.htm --> <!--#4DELSE-->    <!--#4DIF User="Admin"-->       <!--Admin logged in, display admin page-->       <!--#4DINCLUDE AdminPanel.htm -->    <!--#4DELSE-->       <!--#4DIF User="Manager"-->          <!--Manager logged in, display manager page-->          <!--#4DINCLUDE SalesDashboard.htm -->       <!--#4DELSE-->          <!--Other user logged in, display generic page-->          <!--#4DINCLUDE ItemList.htm -->       <!--#4DENDIF-->    <!--#4DENDIF--> <!--#4DENDIF-->

<!--#4DIF LoggedIn=False-->    <!--User is not logged in, display login page-->    <!--#4DINCLUDE Login.htm --> <!--#4DELSEIF User="Admin" -->    <!--Admin logged in, display admin page-->    <!--#4DINCLUDE AdminPanel.htm --> <!--#4DELSEIF User="Manager" -->    <!--Manager logged in, display manager page-->    <!--#4DINCLUDE SalesDashboard.htm --> <!--#4DELSE-->    <!--Other user logged in, display generic page-->    <!--#4DINCLUDE ItemList.htm --> <!--#4DENDIF-->

The second example has better readability and will be much easier to modify than the first.