Turn editing on
Go to any existing activity and click on the Edit button () and select Edit Settings from the drop-down menu.
In the content box, press the Insert special character button () to open a selection of symbols. This is the symbol selection screen:
On the right side of the selection screen, it will show:
Symbol: The symbol icon and the full name shown below it.
HTML-Code: The HTML code used to insert the symbol using the HTML source editor
Num-code: The numerical code for the symbol
To insert the symbol, click the symbol and it will appear where the text cursor is currently positioned.