Something like this, yes. And the visualized codes in the editor should be the *default* view -- there are little to no cases where embedded non-printable control codes would be intentional.
I can't even think of a case where you would want to press a key combination to make them disappear... And I would argue that turning off this visualization of non-printable codes should be a menu choice to toggle them invisible, not a key sequence. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html
