Hold the S button and rotate the main command dial. Choose from the following settings. Z 7II: Choose from settings of ISO 64 to 25600; the camera also supports settings below ISO 64 by about 0.3, 0.5, 0.7, and 1 EV (ISO 32 equivalent) and above ISO 25600 by about 0.3, 0.5, 0.7, 1, and 2 EV (ISO 102400 equivalent).