This setting is recommended for the output of individual colour layers, usually black.
With the function for a single colour layer activated, a suitable
control curve type (CK1) will be taken into account when calculating
the output values. As soon as computation is started by clicking on
the Create layer
icon in the first function group, the file
selector appears where you can choose the desired control curve.
Without a suitable adaptation the results will usually come out too dark.
