None......... Insertion point and text move to the top of the window.
Opt.......... Insertion point moves to the top of the current function.
Cmd.......... Insertion point moves to the top of the current file.
Cntrl........ 

Shift........ 
Shift Opt.... 
Shift Cmd.... 
Opt Cmd...... 
Opt Cntrl.... 
Opt Shift Cmd