When an image is loaded, it is automatically configured to activate the Shutter option. The Shutter option lets you toggle DICOM-defined shutter areas on and off on selected images.
Click Shutter 
to activate or deactivate the shutter option.
NOTE: If you are saving an image with the Shutter option, the image will be saved according to the state of the icon (activated or deactivated) at the time of the save.
The area removed by the Shutter option is not affected by the Magnifying Glass option.