On Microsoft Windows the preference option
Environment > Emulation > Keys > Editor keys like Emacs, Alt is Meta key
now applies to all IDE tools, so your
key behaves consistently.
In previous LispWorks for Windows releases, the Editor, Output, Listener, Debugger, Profiler and Shell tools use it, but other tools do not.
There is no corresponding change in behavior on other LispWorks platforms.
LispWorks Release Notes and Installation Guide - 23 Dec 2011