a monitor is disclosed and includes a displaying device , a supporting device , and a console . the supporting device is connected to and supports the displaying device . the console is connected in communication to the displaying device and is capable of being engaged with the supporting device . the console includes a first switch key and a second switch key . the displaying device can be triggered to switch to a first displaying mode by the first switch key or to a second displaying mode by the second switch key . the detachable design for the console of the invention not only allows a user to quickly switch the displaying modes , but also avoids shaking due to performing the switching on the displaying device by fingers in the prior art . therefore , the invention can effectively solve the inconvenience of switching or setting the displaying modes in the prior art .