Zoom (Z) : sets the mouse to be in the zoom mode.
Select (S) : puts the mouse into the select mode.
Pan view (P) : allows the user to drag the view in the plane of the view port.
Ruler (R) : Once the ruler mode is selected, a distance measurement can be made by pressing the left mouse button and then dragging the mouse.
Edit (E) : click on the element or sweep and press “e” to bring up the editing window.
Monitor ports (M) : INTERCONNECT only, the Monitor ports allows users to select which ports to store simulation data for.