Extron Electronics MVC 121 Plus User Guide - Manual (Page 31)

Mute — Muting or unmuting the left or right mute boxes of the mix-point dialog box
will mute or unmute the corresponding output channel (L or R) as shown below. The
corresponding half of the teal mix point ball will either be shaded (unmuted) or unshaded
(muted).
Multiple open dialog boxes — When multiple mix-point dialog boxes are open (see the
diagram below), the mix-point for the most recently opened dialog box receives the light
green focus circle, while previously opened dialog boxes relinquish their focus. Focus can
be returned by either clicking on a previously opened dialog box, or by double-clicking on
a mix-point.
MVC 121 Plus • Operation 25