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The is the daemon's rotational force strength. Negative settings create a counterclockwise counter-clockwise rotation, positive values are responsible for a clockwise rotation. 0.0 disables the daemon.
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If you want to restrict the scope of a layer please check this option. Each layer can be adjusted individually by changing “Current Layer”. A circle indicates the boundary's dimension (= "@ Boundary").
@ Boundary
Change the size of a layer's zone of influence indicated by a circle. The value is measured in metres.