While the shutter button is pressed halfway, the focus and exposure will continue to adjust, allowing you to take pictures of moving subjects without missing a shot.
.....Choose [ServoAF].
Press the MENU button to choose [Servo AF] from the 0 tab, then press the 41_ buttons to choose [On].
Focus.
The focus and exposure will be maintained where the blue AF frame appears while you press the shutter button halfway.