Hello Mike,
If you're referring to the size of those buttons on the control panels, you could instead assign those functions to buttons on the piston toolbars ("View | Piston toolbars ..."). You can right-click on piston toolbar buttons to assign different functions to them, and you can also choose between two sizes for the piston toolbars by right-clicking on them.
Alternatively, you could potentially use those functions on the Touch Menu ("View | Touch menu"), which are a bit larger than the control panels' buttons.
[I'll move this topic to the "Technical support" section of the forum once you've had a chance to read it.]