In addition to all this, I like to set the putty behaviour to "System menu appears on ALT alone". I'm often doing captures of long diagnostic outputs, and I want to clear the scrollback buffer before I start. With this setting, a quick "ALT-t ALT-l" on the keyboard (Reset terminal, clear scrollback) and my sessions is all nice and tidy. Once the diagnostic session ends, ALT-o (copy to clipboard) is all I need to do to get the output into a decent text editor. There are other useful commands on the system menu that are now instantly accessible, for us mouseophobes.