title: How to undo "write" in SWI-Prolog while tracing?
body: <p>We can type "w" during trace if we want Prolog to display everything in the current and following calls (<a href="http://www.swi-prolog.org/pldoc/doc_for?object=section(2,%272.9%27,swi(%27/doc/Manual/debugoverview.html%27))" rel="nofollow noreferrer">http://www.swi-prolog.org/pldoc/doc_for?object=section(2,%272.9%27,swi(%27/doc/Manual/debugoverview.html%27))</a>). </p>
  
  <p>Is there a way to turn it off, so that it stops displaying everything from that point onward? Something like <code>[nowrite]</code>? I couldn't find this in the document or find a similar question.</p>
  
  <p>----- Edit ------</p>
  
  <p>When we type "w", it will write out everything on the screen. Then if we press [Enter] (or 'l' or 'r' or other commands that leads us to another call), the subsequent calls would still be written out version. So my question is, how to resume to the un-written out version when going to another call, that nullifies our previous typing of "w"?</p>