This may be already answered somewhere around here, but I could not find it. 

Question: Is it possible to have a pull down will a sub menu.  Something like,

Entry 1

Entry 2 --> Entry 2a

                   Entry 2b

                   Entry 2c

Entry 3

Entry 4

Attributes = Author, Subject, Run, Type, Hardware, Software, 

Options Type = Announcement{1}, Shift_Summary{2}, Physics_Discussion{3}, Analysis{4}, Hardware{5}, Software{6}
Options Hardware = Computers, Cryostat/Vacuum, DAQ, Environment Sensors, Magnets
Options Software = Analysis/Simulations, Control/Measurement, Detector, Linux, MIDAS, Sequencer, Windows
Show Attributes = Author, Type, Subject
{5} Show Attributes = Author, Type, Subject, Hardware
{6} Show Attributes = Author, Type, Subject, Software