Hi Gibbi,
Unfortunately, there still isn't a way to programmatically modify the y-axis behavior programmatically. You can do so manually by right-clicking on the hypertrend object and selecting "NI Hypertrend >> Properties". I'm not sure what you'd like to do, but you can add traces and tags programmatically. The "Trend Viewing Options.vi" shows how this can be done. If you explore the LabVIEW example directory, you can find another useful VI that shows all of the properties and methods that you can use with hypertrends:
C:\Program Files\National Instruments\LabVIEW 7.1\examples\lvdsc\_common\Hypertrend & AlertBrowser.llb\HT Properties and Methods.vi
If you would like to see the ability to modify the hypertrend axes programmatically added to LabVIEW, then you can make a product suggestion on our website. Go to NI.com, can click on "Contact NI" then "Feedback".
Thanks for contacting NI,
Marcus G.
Applications Engineer
National Instruments