In order to mark a special event like a start of a destination “A” or an arrival of a destination “B” with a time stamp (M1, M2, etc.) on the PDF, press the INFO button 3 times in a row. When setting the first marker “1” will be shown at the display for 3 seconds, after that the information disappears. For the next marker “2” is shown on the screen and so on and so forth. Up to 255 markers can be set per run.