The open-loop Bode diagram displays magnitude and phase plots for your system.
Bode Magnitude Plot
This plot displays the Bode magnitude of the open-loop system. Grab the curve with your mouse and drag it up and down to increase or decrease the compensator gain. Use the right-click menus to add dynamics to your compensator and to display grids, gain margins, etc.
Bode Phase Plot
This curve displays the Bode phase response of the open-loop system.