You can access to the MOMENT console preferences through the menu Window -> Preferences..., selecting MOMENT -> Console category. From there you can activate or deactivate the output of the debugging, warning, error and result messages.
Preferences of the MOMENT console.
Furthermore, the MOMENT console permits you to activate and deactivate the default output messages of OCLEditor (OCLEditor default messages) and other additional messages (OCLEditor other messages).
View of the MOMENT console showing the result of an OCL query.