Hi. I'm having an issue making a multi-level menu. I have this setup in my admin-view-tree.

However, I can only get two levels to show up on the actual page's sidebar. I attempted to do some code hacking on the .ss page, but couldn't quite get it. Could someone give me some guidance?

Are you using the blackcandy theme? I think it should support at least 4 levels - first level in the tabs, then 3 levels on that sidebar... So try have a look at that Sidebar.ss file

So you would have this sort of structure for 3 levels in the same nav

<% control Menu(1) %>
 // outputs top level - Product Support 
 <% control Children %>
   // outputs BCC Support, BCC worksheet etc
   <% control Children %>
    // Outputs 3rd level - Codename Topaz..
   <% end_control %>
  <% end_control %>
<% end_control %>

I am using the "Pluralism" theme. So a setup like the one you posted should work? And if so, is there some specific order (inside/outside/etc.) I need to put the <ul> and </ul> tags in to create a indented list?

if you want to indent the list then you should nestle the ul so like http://pastie.org/224229

I applied the code in the pastie and it did make a change, however now instead of dynamically showing the levels, it always shows every page on the site, and there are no indentations:

I'm sorry that I have to ask for all the help, but this is really my first time actually using SilverStripe for a project.

You have to use CSS to control the indentations. HTML alone doesnt work. Try something like below. Im assuming the sidebar has a id of #Sidebar

#Sidebar ul ul {
 margin-left: 10px;
}

This is kind of a large bump, so apologies for that. I've fixed a few bugs, but am stuck with one. Instead of only showing the children of the current page/section, it shows every page and every subpage within it.

This is my current Sidebar.ss file:

<ul>
   <% control Menu(1) %> 
       <li><a href="$Link" title="Go to the $Title.XML page" <% if LinkingMode %>class="$LinkingMode"<% end_if %>>$MenuTitle</a>
             <% if Children %>
                  <ul>
                    <% control Children %>
                          <li><a href="$Link" title="Go to the $Title.XML page" <% if LinkingMode %>class="$LinkingMode"<% end_if %>>$MenuTitle</a>
                               <% if Children %>
                                   <ul>
                                      <% control Children %>
                                           <li><a href="$Link" title="Go to the $Title.XML page" <% if LinkingMode %>class="$LinkingMode"<% end_if %>>$MenuTitle</a></li>
                                      <% end_control %>
                                  </ul>
                                <% end_if %>
                          </li>
                      <% end_control %>
                  </ul>
              <% end_if %>
         </li>
      <% end_control %>
</ul>

if you only want to show the children on the selected page then you have to nestle the 2nd and 3rd control Children in a command to detect if they are in the Current Section by using LinkOrSection = section which will return true if you are on that page or a child of that page (eg in the same section of the tree

<ul> 
<% control Menu(1) %> 
<li><a href="$Link" title="Go to the $Title.XML page" <% if LinkingMode %>class="$LinkingMode"<% end_if %>>$MenuTitle</a> 
<% if LinkOrSection = section %>
<% if Children %> 
<ul> 
<% control Children %> 
<li><a href="$Link" title="Go to the $Title.XML page" <% if LinkingMode %>class="$LinkingMode"<% end_if %>>$MenuTitle</a> 
<% if LinkOrSection = section %>
<% if Children %> 
<ul> 
<% control Children %> 
<li><a href="$Link" title="Go to the $Title.XML page" <% if LinkingMode %>class="$LinkingMode"<% end_if %>>$MenuTitle</a></li> 
<% end_control %> 
</ul> 
<% end_if %> 
<% end_if %>
</li> 
<% end_control %> 
</ul> 
<% end_if %> 
<% end_if %>
</li> 
<% end_control %> 
</ul>