Realtime design rule check
Start the realtime design rule check in layout menu "Actions":
The realtime DRC in TARGET 3001! checks spacing violations according to the predefined value. Enter those value to this dialog:
If during the routing process this minimum spacing between tracks is not kept, you get an acoustic and optical hint.
A click M11 upon the error box displays in clear words, what the error means.
To get rid of the error box again and the bad track segment please just press the "BackSpace" key [<- ].