1. In the UI, pick a base node to operate on and choose the operation
2. Select a tool object in the scene, and press the start button.
3. The tool object will be positioned in the base object surface, following the mouse; use right-click to stamp the object shape or left-click to finish.
   • Hold SHIFT and move the mouse to displace the tool towards-away the target surface.
   • Hold CTRL and move the mouse towards-away from the tool object to rotate it.
   • Hold CTRL+SHIFT and move the mouse to change the scale of the tool object.

Note that the objects must be geometry that can be converted to Editable Poly and, the tool will collapse the modifier stack.