Font
Select a Font from the drop-down box and use the check boxes to set the (Bold, Italic, Underline, Strikeout) style characteristics of the chosen font. The fonts that are available for selection will depend upon the Windows™ Fonts you have installed on your machine.
Support for Unicode Symbols
Most fonts support only a small fraction of the available Unicode symbols. In general, modern fonts, like Calibri, provide better support than older ones, like Tahoma. For this reason, the File Editor uses Calibri as its default font.
When a font does not support a certain Unicode symbol (for example, a subscript 2 in Tahoma), you will see an empty rectangle instead of the subscript character. The easiest way to resolve this problem is to use a font that supports that symbol.
The trick is in knowing which fonts do support it. Websites such as http://www.fileformat.info/info/unicode/index.htm are invaluable: not only do they have browsable and searchable lists of symbols, they also list the fonts that support them.
If you are not entirely sure of the symbol you need, browsing or searching for that symbol online may help you. Once you've located it, simply copy it directly from the search preview or browser test page, and then paste it into the application.
If you already know what you are looking for, the Windows Character Map, with Advanced view enabled, might be best. Search is case sensitive (e.g. "Subscript Two"). Because the characters are listed by font, choosing the working font will reveal if it supports the desired symbol. You can then Select and Copy it from the Character Map and paste it into the application.
Script
Select an encoding option from the drop-down list. The default encoding for text is ANSI. However, if you are using a Cyrillic (or other non ANSI) language variant, several options are available for selection.
Size
If the Font dialog is opened from a Font preview box, you have the option to specify a Fixed Size (in points) or make the font scaleable by specifying a Scaled Size in grid units.
Style and Effects
Set the (Bold, Italic) characteristics and the (Underline, Strikeout) effects of the chosen font.