Q. Sometimes 'Reset' clears stdin, and sometimes it
          doesn't.  How does Visual X-TOY decide when to clear stdin and when
          not to?
        A. Editing stdin in 'Edit Mode' changes the state to which
          stdin resets, whereas editing stdin in any other mode only changes
          the current state of stdin.
        Q. When I open up files, sometimes Visual X-TOY opens a
          new window, and sometimes it reuses the current window.  How does
          Visual X-TOY decide when to reuse the current window?
        A. Whenever you open several files at once, Visual X-TOY
          always opens new windows.  However, when opening a single file,
          Visual X-TOY will reuse the current window if and only if the file
          has not been changed since it was last saved.