How do I create a new webpage in the Documentum front end Webtop?
Why WebTop? You should use Web Publisher which is built on WebTop with the specific purpose of managing web content. Is this an OOTB installation? Web Publisher / WebTop requires significant amount of customization in order to start being useful. Do you have templates defined? If so, then just go to File New and select your template.
http://www.dmdeveloper.com/ Is a good site with some very good how-to's.