Can I enter a symbol into a graph title?

Yes, you can easily enter symbols and special characters (such as a, b, or σ) into a graph title. First, double-click on the title of the graph to display the Graph Titles/Text dialog. Change the font to Symbol, position the cursor at the point where you want the special character(s) to be inserted and enter the symbol(s) into the title.  Another way to retrieve these characters is to use the Character Map program that comes installed with Microsoft Windows. This application allows you to copy these characters to the Clipboard and then paste them into your title.