How to set the back focus of Sony SLR?

Press the menu key in the upper left corner of the back of the camera to enter the menu;

2.

Select the first row and the first column (camera mode) to move down and move to the menu focus mode (orange-red illumination) of item 6 on page 2;

3.

Press the DISP center button on the right side of the back of the camera to enter;

4.

Select AF-C (single autofocus) or AF-C (continuous autofocus), and press the DISP center button after the orange light comes on to exit the setting.