To Add Symbols or Special Characters to Label Styles

In the Label Style Composer dialog box, click the Layout tab.
Select a component from the Component Name list.
Under Text, click the Value column for Contents, and then click .
In the Text Component Editor dialog box, click the Format tab.
Click in the Text Component Editor window in the location where you want to add the symbol or special character.
Click Symbol.
From the list, select a symbol, such as degree, diameter, or plus/minus, or a non-breaking space.
The symbol is added to the label text at the cursor location.
To select a special character, click Other to display the Character Map dialog box.
Select a character, click Select, and then click Copy.
In the Text Editor window, place the pointer in the location where you want to add the special character.
Paste the copied character by either right-clicking and clicking Paste or pressing Ctrl+V.