These five main menu keys (also called hard keys or function hard keys in some supporting documents) are horizontally arranged along the lower edge of the touch screen. The main menu key functions change to match specific instrument Mode settings. The main menu keys generate function‑specific submenus. The various measurement modes are selected by pressing the Shift button and then the Mode (9) button. Descriptions of the various measurement modes can be found in the applicable Measurement Guides listed in Supplemental Documentation.

These submenu keys (also called soft keys in some supporting documents) are arranged along the right‑hand edge of the touch screen. The submenu key labels change as instrument measurement settings change. The current submenu title is shown at the top of the submenu key block.