A shape taken from the drawing

Press W and click the drawing. The area becomes a new shape on the active layer, in the fill color, and it comes out selected.

In Trace mode, Drawing takes everything joined to the clicked point on the active layer, in any color, and closes gaps of one or two pixels between the lines. Fill holes adds the space the drawing encloses.

Object takes the topmost object under the click on the active layer, together with its group. Color follows only the color under the click, over the whole frame, within the Color tolerance.

Outline only makes a line in the stroke color and width instead of a fill. Ctrl+Z undoes the new shape.