The [ Solve ] Menu has only 8 options listed, leaving room for the inclusion of [ rsolve ] for the solution of recurrent Difference Equations, a very useful function, actually ommited from the Solve Menu.
A Better suggestion would be to allow [ User ] customizable Menus, providing a Base ( factory original ) Template, which could be Freely [ Edited ] by the user, like [ TI-89 Custom Menus ] or [ HP 50g Custom Menus ].