How to draw A: a PCa area, B: capsular invasion, and C: modify the extent of capsular invasion. D: Magic Wand Tool. A: The pathologist sketches the boundary of the PCa area. After clicking "accept", the boundary is completed automatically. B: The user sketches lines to describe a capsule invasion. C: The user can modify the extent of the capsule invasion by selecting and moving the blue squares shown above. D: The "magic wand tool" allows selecting areas marked on the background image by selecting "only outside contour," the tool marks only the outside contour of the focus; otherwise, the inside contours are included.