Converting histogram bins to actual raw values

Hello all,

I have created a 2D wave that is a 2D histogram of two different waves.  When I "create a new image" the 2D histogram's axes are in bins.  How can I convert those bins to raw values? For example if the bottom axis is energy, I would like to see the actual MeV values that the bins correspond to, rather than row 1 to 2 and column 1 to 2, etc. Is there a way to display an image with a converted corresponding axis?

Alternatively, I can achieve this by doing "Display x vs. y", but I need to be able to subtract them.  Is there a way to save a displayed graph to operate on? I hope this makes sense.

I attached the 2D image of what I have, and a scatter plot of what I would like to have.

Thank you