Double-click the desktop icon for Cubase to launch it. Click "File," then "Open." Double-click on the project on which you want to work. Press "F3" to switch to the Mixer window.
Click on the pan control for the track you want to adjust. Each track's pan control is located directly above its volume slider.
Drag the pan control to the left or right. Hold down "Shift" and move the pan control to make fine-tuned adjustments. To return the pan control to the center position, hold down "Ctrl" and click on it. Repeat this process for every track you want to pan.
Change the pan mode, if desired, by right-clicking the pan control. Choose from "Stereo Balance Panner," which is the default panning mode, "Stereo Dual Panner," which splits the track into two channels and applies a pan control to each channel, and "Stereo Combined Panner," which applies the Dual Panner effect, then links the two channels.