We don't quite understand what exactly you mean by "rad panel menu". However, if you want to display only certain levels from the site map, for example only 2nd level and deeper, you can do it like this:
1. Use SiteMenu
control (located in section Navigation in the Toolbox, this control wraps the RadMenu and SiteMapDataSource controls)
2. From Edit Properties
, set the StartingNodeOffset
property to 1
This would cause the menu to display pages one level deeper than the starting level.
, section Misc
, click Edit
. expand the Behavior
subsection and select Horizontal
for the Flow
Do let us know if you need any further assistance.
All the best,
the Telerik team