GH Panelling Tools: Extend a surface grid by another row of gridpoints

Dear Grasshoppers.

I was playing with the sublime Panelling Tools plug-in and I was wondering if there is a way to add an additional row or column of grid points to a grid on a surface.
So to speak, I would like to extend the surface grid by one or two extra grid points without actually extending the surface.

Could anyone think of a way how to achieve this?

Greetings and thanks in advance.