In SharePoint Designer 2013 the design view has been removed, but sometimes it works to open a SharePoint 2013 list in SharePoint Designer 2010 and customize it in design view there. Peter Kalmstrom shows how to do it. Note that you use this method at your own risk. It is not supported by kalmstrom.com or Microsoft. We still show it, as many need the design view even if they use SharePoint 2013.