The RGB viewer gives you a graphic representation of what you are doing in the key. In this section, learn how to:

• Move, rotate, and zoom in on the RGB viewer.
• Change the display of the 3D histogram and canvas.
• Change the appearance of elements in the RGB viewer.
• Select key elements in the RGB viewer.
• Plot pixels in the image and in the RGB viewer.
• Translate, rotate, and scale key elements in the RGB viewer.
• Reshape the convex hull by manipulating its vertices.