How do I add a second Y-Axis on a plot?

[quangnguyen09]

Looking through the manual, I can see there are mentioned of X2 and Y2 axis. However, I am unable to figure out how to add those axis to my plot. How do I enable these axis on my plot?

[johannes-wolf]

Additional axes automatically get added as soon as you use them via the axes: (...) parameter (for plot.add and plot.add-* commands). The only visible additional axes are the x2 and y2 with the scientific axis-style. But you can use any number of axes.

[quangnguyen09]

The axes: (...) parameter was the answer. Thank you!