Maxsurf Stability - Hydromax edit graph axes

Hi everyone,

I am preparing a Trim & Stability book using Hydromax (Maxsurf Stability). 

I want to format the output graph for GZ curves and tank calibrations - the x axis scale is wrong (soundings x axis is 0-7m when it should only be 0-1.5m) and the gridline spacing is too wide (often no vertical grids at all).

I understand the graphs can be edited as I've seen T&S books that have better presented Hydromax output graphs.

Any help is greatly appreciated! I've already looked in the manual with no luck.