The Answer Editor for histograms consists of a space for drawing
histograms and icons (buttons) for creating and adjusting bars
Initially, the histogram appears with a small number of bars (e.g., two).
The height of the bars is adjusted by clicking on the top edge of each
and holding the mouse button down while dragging to the desired height.
To add bars, click on the icon with the plus sign; to subtract bars,
click on the icon with the minus sign. Each bar has a space beneath it
where an appropriate label can be typed in.
Any bar may be set to any integer height by dragging. To set the height
of a bar at a non-integer value, enter the value in the white area
to the upper right of the histogram, then click on the icon with the
broken horizontal line. This will place a broken line on the histogram
at that height. Any bar may then be dragged to the height of any broken
line that has been placed.
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