Scaling of Y-Axis

FlexPro 10.0.21

Hello,

I am using FlexPro to analyse a set of data with 120,000 data points and a range of values between 476 and 480. I need a diagram with a Y-axs between 450 and 500.

When I create a new diagram the Y-axis goes between ±15,000 (see first image). Even setting the range of the Y-axis to be between two fixed values has no effect on the scale of the Y-axis (see second image).

I must be missing something simple but would be grateful for any assistance.

Thank you,

Hugh