# Region Shape

Setting | Description
--- | ---
Region Shape | Select the shape of the input region. Selecting None=Use entire image means that the tool uses the entire input image. The set of region-defining parameters that appear depend on the region shape you use. For more information on using a polygon as an input region, see the topic Using Polygon Input Regions.
Selected Space Name | The coordinate space in which the region is interpreted. For information, see the topic Coordinate Spaces.
Select Mode | Available when Region Shape is CogRectangle or CogRectangleAffine, selects the set of parameters that define the rectangle. For CogRectangleAffine, be aware the angles of rotation and skew can be specified in degrees or radians, although the underlying tool keeps the measurements in radians.