Create Polygon, Select in Area
This function creates a closed polygon (polyline) of the area defined by a selected point in the drawing.
Find it here:
MOUS_ICO Menu: Landscape > Construct Lines and Polygons > Create Polygon, Select in Area
MOUS_ICO Toolbar: Construct Lines and Polygons: Create Polygon, Select in Area
Pick a point in the drawing and press ENTER. The function will create a closed polyline for the area defined by the elements in the drawing containing the selected point.