Add Cell Headers and Text Entries to Graph Cells

To add cell headers and text entries:
  1. Click and drag the appropriate icon from the Insets panel to the cell.
    Cell Header icon
    Click and drag the Cell Header icon to the cell. A header text box is created above the cell.
    Text icon
    Click and drag the Text Entry icon to the cell. A text box is created near the location where the icon was dropped.
  2. In the text box, type the text that you want.
You can later right-click a cell header or text entry in order to change its properties or to remove it.