Four M commands terminate a Direct Mode session:

The HALT command, or a <CTRL-Z> exits Direct Mode and terminates the M process.

The ZCONTINUE command instructs GT.M to exit Direct Mode and resume routine execution at the current point in the M invocation stack. This may be the point where GT.M interrupted execution and entered Direct Mode. However, when the Direct Mode interaction includes a QUIT command, it modifies the invocation stack and causes ZCONTINUE to resume execution at another point.

The GOTO and ZGOTO commands instruct GT.M to leave Direct Mode, and transfer control to a specified entry reference.