Graph control plotting area stretching

Hi,

We are using NationalInstrument.Controls.Graph from Measurement Studio 2015 in our C# WPF projects. And we just found that, after doing some zooming in, the right edge of the plot area stretches to the right in length. Is there a way to freeze the plot area in its size programmatically? Please find attached the before and after snapshots.

Thank you very much,

OxTS