Enter shift or alt key using stylus?

[pburns001]

Hi, I'm using the Surface Pro without a keyboard and I can't find a way to enter key combinations like "shift-tab", "alt-some key" etc using the pen input panel or with the stylus alone. Does anyone know how to do this?
For example, to enter "shift tab" I tried using the input keyboard but the shift key is on one screen and when you move to the keyboard screen with the tab on it the shift is gone.

thanks