How to open the upper left context menu via keystroke (for PuTTY on Windows)

Does anybody know a keystroke to open the upper left context menu in Windows operating systems? I'm referring to the one listling:

• Restore


• Move


• Size


• Minimize


• 
  

  Maximize

  
  


• 
  

  Close

  
  

In particular I want to restart individual 'inactive' putty sessions without using the mouse by any chance.

Answer

You need to set System menu appears on ALT-Space or System menu appears on ALT alone in PuTTY's Windows | Behaviour settings.