The Brush > Clip Brush Modifiers sub-palette provides controls for the Clip brushes.
The BRadius will use the brush size to establish how much of the surface will be pushed when using the Clip Brushes.
When using the Slice brush and activating the BRadius option, the Draw Size (the brush radius) will be used to create a PolyGroup along the curve with its width defined by the brush size value. In essence there will be two lines created when this option is activated.
When pressed the PolyGroup button will create a Polygroup every time a mesh is clipped by one of the Clip Brushes.
The Unclip button cancels the most recent clip that has been created by a Clip brush. However, any sculpting details that were added to the surface after the clip are retained.
This is very useful for adding details or accurate strokes to a clean surface that has been temporarily flattened by a Clip brush. Once the details have been added, pressing UnClip will restore the surface to its curved shape and move the new details to match.
This sub-palette can be accessed while you work as a pop-up menu at the cursor by pressing Ctrl+Spacebar.