If not all signals are interesting for later processing, choose the triggered recording in the Setup window to save disk space. All digital triggers > 0 defines the length of the recorded signal. The rest (digital trigger = 0) will not be recorded. Switch to the Record mode and press Record. An additional LED appears which lights if signals are recorded to file. If the LED is off, the program waits for the occurrence of the next digital trigger.
The latest digital trigger value is shown and with every change of the digital trigger, a vertical line is plotted. If the digital trigger value is only some milliseconds active, the trigger number might not be visible, only the vertical lines are visible.