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"Invert" button can be used to invert the color palette of the image.
"ROI Window" button can be used to window/level images by region.
Measuring and Annotations
In the middle of the toolbar are measurement features. Users can measure length and angles, annotate images, and select various region of interest tools. Region of interest will tools show area, mean, and standard deviation calculations. Probe will show "Probe" tool shows various pixel measurements (xy, SP, MO, etc). The "Magnify" tool magnifies the region where mouse is left clicked. "Clear" button can be used to remove all annotations. 
Hanging Protocols and Stages
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