Having created the histograms, use the ``Hist'' selection to choose
whether to display a histgram for the whole, left or right of the
brain. Insert the number of the histogram (see section
23.2.4) into the ``Hist no:'' field, then press the ``Plot
Hist'' button. A histogram ofthe region is displayed in the Imcalc
Graph TV, and the region description label and mean of the values in
the histogram is displayed in the Tina Tool text window.