Fade to Black
Fade To Black allows you to cut or fade the entire output of the control panel to black. This can include just the MEs assigned to the control panel, depending on how you have Fade to Black set up, and what MEs are assigned to your panel. Downstream Keyers are also affected by the Fade to Black.
If you are controlling an Audio Mixer from the switcher, performing a Fade to Black will not change the level of the on-air audio channel. Instead, Fade to Black turns off the Main Audio Control on the Audio Mixer.
Fade to Black only affects the MEs that are assigned to your control panel, and that Fade to Black is turned on for. If more than one control panel has the same ME assigned to it, performing a fade to black sets that ME to black on all control panels.