add separator in the sessionmenu

     $itk_component(sessionmenu) add separator
    
     $itk_component(sessionmenu) add  -label "Add images..." \
        -underline 4 \
        -command [code $this addImages]
  
     $itk_component(sessionmenu) add separator
 

原文地址:https://www.cnblogs.com/greencolor/p/2116773.html