ETC Congo Family v6.4.0 - Manual (Page 632)

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"-" (Dash) means the category is unmasked - all parameters are available for control and
recording.
"fcb" (Lowercase lettering) means the category is partially masked - some parameters have
been masked and are unavailable for control or recording.
"FCB" (Uppercase lettering) means the entire category is masked and no parameters from
that category are available for control or recording.
Mask - Editor (6.1)
In the Mask Editor, single parameters can be toggled on/off by pressing MODIFY in the
Allow column. This also means that, if you want to toggle a parameter column on/off, you
can select the top cell, press COLUMN to select the whole column, and the press MODIFY.
Hold MODIFY and press MASK to open the editor.