Allows selection of a portion of the image to be the new image. In the display pane, northwest and southeast corner points adjusts the crop window to suit; dragging in the crop rectangle moves it around the image.
The northwest and southeast control points have two different behaviors; the northwest point (yellow rectangle) maintains the original image aspect ratio; the southeast point (red circle) allows free-form change of the crop box. You switch from one to the other simply by dragging the appropriate control point.
Tip: Drag the Commands box out of it's docked position to make it bigger for more precise control of the crop window.
Properties: See tool.crop.* in Configuration Properties