QMesh (Polygon Action)
Polygon Action
https://gyazo.com/62bf4fbb100b8550be7552df38fa43ae
The QMesh Action lets you click and drag to extrude the Target polygons.
Polygon Actions | ZBrush Docs
Extrude (Polygon Action)
+ 周辺 Geometry への融合/削除 を加味したような Action