If you would like to measure the time between two points on the signal, you can select the A1 and A2 markers underneath the Timing Marker Pair tab on the right side. Click the A1 button, which will put a marker on your cursor. Click on a peak in the waveform. Click on A2, which will put another marker on your cursor. Find an adjacent peak to place the second marker. You should see the time difference between those points appear next to the A1 and A2 buttons.