The function "Reduce Shell Number" is used to define an area in which the strand count is reduced by a precise amount. For exampe, when drawing a "reduce shell number" area on a side of the entity in which two strands are to be made, they can be reduced to only one strand.

For doing so it is necessary to draw a zone by clicking "Add" button and drawing lines to close the desired area.

By clicking the "Parameters" button a window will open on the right of the screen, allowing the user to change the "Reduce Shell Number" settings only for this specific istance. The global parameters are instead modified by clicking the "Printing Parameters" button on the top right of the screen.