You must turn on the “Power down monitor when idle” and “Power off monitor” checkboxes before you can set the delay for monitor power-down.

Use this slider to adjust the delay before the monitor is powered off completely.

If you need to enter a delay that is beyond the slider’s range, option-click on the slider and then type in the value you want.

You must turn on the “Power down monitor when idle” and “Suspend monitor” checkboxes before you can set the delay for monitor power-down.

Use this slider to adjust the delay before the monitor is put into “suspend” mode.

If you need to enter a delay that is beyond the slider’s range, option-click on the slider and then type in the value you want.