I know what is different between "Page Layouts" and "Text Layouts". But what about web part zones? How web part zones fit in this picture? Is web part zone just one small part inside Text Layout, which have one webpart or?
Also, how I can customize "Text Layouts", is it even possible? Example, if I want choose "Two columns with header and footer" and I want remove top column or change it size. Is it possbile and how? I use SharePoint Foundation.