The Qualitative Timeline Settings offers controls for the Display and Vertical Scaling of the timeline.
Adjust Display to control showing the scales and legend. By default, the vertical scale and the legend are shown.
Use the Vertical Scaling to switch between the default Automatic Scaling and the Manual Scaling of the y-axis. To specify explicitly the maximum scale value, use Manual Scaling. To compare visually two or more Charts in the same or distinct Views , you will need to specify the same maximum value for the charts.