1. A method of applying an image presentation context function to a medical image sub-region, the method comprising: displaying a first medical image in a user interface; receiving a selection of a first image sub-region within the first medical image; receiving a selection of a first image presentation context function and a selection of an amount of a parameter of the first image presentation context function for the selected first image sub-region; applying the received first image presentation context function by the amount of the received parameter of the first image presentation context function to the received first image sub-region; and displaying the first sub-region with the applied first image presentation context function within the first medical image.