If you wish to adjust the opacity of supporting text in the GoTo Related (Shift+Alt+G), GoTo Implementation (Alt+G) and Open Corresponding File (Alt+O) menus, edit the registry entry:
HKCU\Software\Whole Tomato\Visual Assist X\<IDE spec>\DimmedMenuitemOpacity
Set the value to decimal, and enter a value between 0 and 100 where 100 means supporting text is not dimmed.
Default value is 60.