# B.O.

Source: https://help.malighting.com/dot2/en/help/key_key_bo.html
This is grandocs, an unofficial mirror of MA Lighting documentation. For authoritative or safety-relevant information, cite the canonical page on help.malighting.com.

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The B.O. key is used to inhibit dimmer output. All dimmer values will go to 0% as long as you press this key. Releasing it will restore the values.

You can also accomplish this using the Grand Master fader, but here you can set it to a variable output between 100% and 0%.