This tool allows you to draw a rectangle and duplicate all objects
enclosed in the rectangle in the drawing as a single group object.
This is primarily useful for creating details from the existing
Using the Camera tool to 'take a snapshot', and then moving the
new group to one side.
Lines are clipped to the perimeter of the rectangle that you
draw, but other objects, such as polygons are not. You'll have
to trim these yourself once you get the detail placed on the drawing.