ToolTipText: -

20620 "IDH_SetAxisY"
20621 "scrollbar will rotate the features around the vertical axis to reset to component 2."

The default for this control is 2 (or 720 degrees).  Note: - If you set slider for the X-axis below 360 then all the features will collapse to the vertical axis as shown here.

Using this slider will rotate the features around the vertical axis and if you keep the mouse button clicked or use the arrow keys when selected on this scrollbar the plot will keep rotating but will stop as soon as you take your finger off the button. As an aid to automatic rotation if the system finds that the Y-axis is not an integer (i.e., just click the up scroll once) then, when you scroll the Z-axis, then for each degree of  increment of the Z-axis there will be a degree of  increment in the Y-axis. The same applies for the X-axis. In this way you can achieve a full rotation in only 180 degrees instead of the normal 360. If you want to reset the Y-axis back to its default this slider. You can also activate stage three of the resetClick to see the Rest control control.