EvaluateCell ButtonStyle
The third button in the sample palette has the "EvaluateCell" ButtonStyle. If you select the 15 in the next cell and press the third button, the 15 is changed to (15+1), the input cell evaluates, and the contents of the resulting output cell are selected once evaluation is finished. The results are similar if a part of an output cell is selected.
Created by Mathematica (May 16, 2004)