You can use the RUN/PAUSE/DELETE button to Pause the machine at any time. However, it will not stop the spindle...so the only safe way to do this would be to pause the operation when the spindle is elevated and not actually cutting. (For example, during a shuttle or jog movement as the machine is moving between cuts).
The other option, which we feel is safer...is to use the BreakPoint function.
Where you simply press the STOP/CANCEL button one time...and the machine will ask you to save a break.
When you press OK to save the breakpoint, you will then choose a numbered location to save that point to (1 thru 8).
Afterwards, you can make any changes needed...including turning the machine off and leaving the shop for the day.
If the machine is turned OFF, just remember that you need to HOME the machine before resuming the job.
These details and operation for saving a breakpoint as well as resuming from the breakpoint will be covered further in the manual.