I have very small numbers on the Y-axis, such as 0.00033 and 0.00046, etc. I am using the smart scaling, and it seems that the most it can do is two decimal places XX.XX.  It shows the labels I want, but they all say 00, even though they show up.  If I have one that has a bigger range, and I zoom it, it starts to show 00 once you past two digit resolution, yet it shows plenty of 00s.  Since the labels do appear in those ranges, I want them to simply display the text to more digits, such as 0.0003, 0.0004.  How do I make the labels show more digits?  The extent is definitely big enough.