How to align y-axis zero points


Anyone know how to get the y=0 point on two axes to align? Since one of my datasets has negative numbers (acceleration) and the other doesn’t (altitude), the zero point on each y-axis is by default not aligned. Any ideas on how to align them every time, despite the varying content of each dataset?

Here’s a snapshot: 



Never mind. I just went ahead and manipulated the defaultRange of each y-axis so that the same percentage was below the x-axis as above.

This aligns the zeroes. In other words, no matter what the scales are, if 80% of each is above zero and 20% is below, the zero values will be vertically aligned.