[TYPO3-english] Help changing menu display levels

[Tim Hogan]

I am using the template that comes with the introductory package of
Typo3 and I could use some help trying to figure out how to change the
number of levels that is displayed for just one page.  If I am
understanding the layout correctly, it is something like this;

Home
  |- Page1
    |- SubPageLevel1
      |- SubPageLevel2
        |- SubPageLevel3

Page1 is displayed along the top beside of the search bar and the
SubPages are displayed along the left hand side for three sub-levels. 
What I want to do is stop the display of the sub-menus under
SubPageLevel2 on the left side but still be able to display level 3 with
the Menu/SiteContent content element.  I have tried to the the "hide in
menu" option but that seems to hide the item everywhere.  Any ideas? -
Thanks