How to change perspective view into camera view in Maya without creating a new one and adjusting the angle

In fact, the method is very simple. You still need to create a new camera, then select the perspective camera in the outliner window, then select the camera you built yourself, and call the Constrain/Parent constraint command. Uncheck the command option. Just select Maintain offset, and then delete the constraint node under the created camera. It will be done in 30 seconds.