I don't believe that Word 2011 has a Tools > Customize Keyboard.
I am assuming (mistake) that Word 2011, which I have never seen, works much like Word 2010.
Try Customize the Ribbon > Keyboard (button). You should find this under File > Word Options or Options.
There are commands: ApplyHeading1, ApplyHeading2, and ApplyHeading3.
There are no built-in commands for the other heading styles. You will need macros.
I recorded macros for this and put them in a template which can be stored in the Word
Startup Folder that gives keyboard shortcuts.
The macros follow this pattern:
Code:
Sub ApplyHeading5()
'
' ApplyHeading5 Macro
' Applies Heading Style 5 to selection
' Recorded by Charles Kenyon
Selection.Style = ActiveDocument.Styles("Heading 5")
End Sub
If you want, you can download my templates from my
Downloads page. I do not know how they will translate to the Mac. The key assignments are for Ctrl+Alt+4 through Ctrl+Alt+9. I do not know whether the Mac requires a Cmd key assignment instead.