When you use the tools of myCADtools there are sometimes windows of messages which appear. It is then possible to check the option not to display these messages more.
The list of all the messages which you checked appears here in this window “Masked messages“. If you wish to see them reappearing it is enough to uncheck them. You will see the window again being displayed when the message must be visible.
This window is common to several tools myCADtools and it is thus possible to select the tool for which you wish to reactivate the messages.