Adding Greek Symbols and Character Formatting to Text Add Greek symbols to any text on a graph. Use rich text formatting on individual characters. Greek symbols and individual character formatting are available for graph titles, axes titles, legend text, and text boxes. Click on the Rich text formatting icon. Modify the text. Click OK to apply the changes and to close the dialog. Tip: For a complete set of Greek symbols, click on More symbols. Figure 1. The Rich text formatting dialog.