Different lighting environment parameters are set differently. In the case of dark light, it is difficult to achieve good results by automatic exposure, and it must be manually operated within m range. If you have no experience, change the iso value of the aperture shutter and adjust it to a suitable position. Alternatively, you can use enclosed automatic metering and use the M file after the reference value.
In addition, the night portrait must use an external flash to have a good effect. If they flash inside, the contrast between the background and people will exceed the standard. The following is a normal exposure using the night scene effect of the flash.