When you open a drawing with a missing font file, this dialog box is displayed to allow you to choose a replacement font file for the style.
The following options are displayed.
Lists the font family name for all SHX fonts in the Fonts folder or all registered TrueType fonts.
Lists all available Asian-language Big Font files when a Big Font is missing.
Displays the Open dialog box (a standard file selection dialog box), in which you can select a different font file to use.