PTZ Controller v3 provides 3 ways to control PTZ Camera Iris.
3 ways to control Iris:
- Click the Auto/Manual bar
to select control iris automatically or manually. The iris open 
and iris close 
buttons are available for manual control only. - Use Keyboard Shortcuts,
for iris open, 
for iris close. - If joystick or gamepad is connected, you can also control iris with joystick or gamepad.