Second, focus on the face of the portrait to be photographed, focus on the eyes as much as possible, and make a composition after half pressing the shutter. When you hear the "click" sound of the camera, it means that you have finished focusing, completely press the shutter and finish shooting.
Third, keep the camera stable when pressing the shutter after focusing, try not to shake, and only translate the camera in the focal plane for composition.
When the shutter is half pressed to focus, there is a small red square in the viewfinder to indicate focusing, or you can use your thumb to toggle the rocker to accurately place the small red square on the face of the person being photographed.
Photography also tests a person's patience and understanding. When shooting, you should be as serious as a shooter: the camera is your gun, the focus is your bullet, the shooting target is the target, the shutter is the trigger, and three points are in a line.
After doing this, the camera can point to where, that is, it is fast and accurate, and it is difficult to think clearly about the photo.