public void setInitialCropWindowRect(Rect rect) {
    mInitialCropWindowRect.set(rect != null ? rect : BitmapUtils.EMPTY_RECT);
    if (initializedCropWindow) {
      initCropWindow();
      invalidate();
      callOnCropWindowChanged(false);
    }
  }
Set crop window initial rectangle to be used instead of default.
core/src/main/java/com/theartofdev/edmodo/cropper/CropOverlayView.java