In a method for adjusting display parameters of a monitor of a computing device, the computing device electronically or wirelessly connects to a mouse that includes a primary button, a secondary button, a scroll wheel, a function button and a microcontroller. The microcontroller detects whether the function button is pressed, clicking of the primary button or the secondary button, motions of the scroll wheel, and motions of the mouse. An adjustment mode of the monitor is predefined. The monitor is controlled into the adjustment mode by pressing the function button. The display parameters can be adjusted with the primary button, the secondary button or the scroll wheel when the monitor is in the adjustment mode.