Mathematica Tutorial: Notebooks And Documents - Wolfram Research

Notebooks and Documents 13The insertion point is indicated by the cell insertion bar, a solid gray line with a small blackcursor running horizontally across the notebook. The cell insertion bar is the place where newcells will be created, either as you type or programmatically. To set the position of the insertionbar, click in the notebook.To Create a New Cell:Move the pointer in the notebook window until it becomes a horizontal I-beam.Click, and a cell insertion bar will appear; start typing. By default, new cells are Mathematicainput cells.