The name of font.
The font name may be followed by "bold" and/or "italic".
This example specifies the font "Courier New" with bold and italic:
Courier New Bold Italic
For charts and heatmaps, the default font is Arial when this attribute is blank or the font is not found on the system.
In previous versions, this attribute represented the filename of a font that is installed on the server. Font files are located in the Fonts folder, usually c:\windows\fonts. Font filenames may still be used, but font names are recommended.