Fluke DSX-600 Technical Reference Handbook page 147

The orange, dashed lines are at the start and end of the

cabling that the tester includes in the test results.
To zoom in and out, use the pinch, reverse-pinch, and double-tap
gestures on the touchscreen. You can also use the zoom controls
to change the magnification on the distance and amplitude scales
independently. See Figure 8 on page 21.
For HDTDR plots for short cables such as patch
cords, the tester does not change the magnification
for the distance (horizontal) scale.
Chapter 6: Diagnose Copper Test Failures
Note
The HDTDR Analyzer
129