disabled, then pressing ALT-Space will just send \c{ESC SPACE} to
the server.
+Some accessibility programs for Windows may need this option
+enabling to be able to control PuTTY's window successfully. For
+instance, Dragon NaturallySpeaking requires it both to open the
+system menu via voice, and to close, minimise, maximise and restore
+the window.
+
\S{config-altonly} \q{System menu appears on Alt alone}
If this option is enabled, then pressing and releasing ALT will