The histogram is a statistical tool that supplies information about the frequency of element distribution. Beside the histogram in the main dialog, there is certain statistical data as well as the arithmetic median or the most frequent value (mode). Information regarding the relative and absolute frequency is also included in the display. When you move the mouse pointer over the histogram, the data that belongs to the value under the pointer are displayed. You can also select a range of values by marking an area with the mouse button pressed.