Since LT2006 customizing the toolbars, but especially the screen menu (pulldowns, right-clicks and more) has moved away from the realm of the CAD Manager and is mor easily available to the individual user.
CUI command launches you into the customizing window that let's you change almost everything you see on screen in LT. The following free tutorials are LT2006 specific but the majority still applies to LT2007 and LT2008:
http://autodesk.blogs.com/between_the_lines/2005/05/autocad_2006_tu.html
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