The configuration file is a text file where each line contains a key name, followed by an
equals sign, then a value, e.g. WindowBorders=no. Possible keys are:
| WindowBorders=[yes/no] | Turns on or off borders between windows. |
| WindowFrame=[yes/no] | Turns on or off the interpreter window's frame, that is, the title bar and the border around the whole window. |
| WindowMask=[number] | Uses the given Blorb resource number to set the mask for the window from the graphic. If a particular pixel in the graphic is white then the window is transparent at that point, else it is opaque. This key only takes effect if "WindowFrame=no". |
| WindowWidth=[width] | Sets the width of the interpreter's window so that a single, full-size Glk window will have a width of the given value. |
| WindowHeight=[height] | Sets the height of the interpreter's window so that a single, full-size Glk window will have a height of the given value. |
| FullScreen=[yes/no] | If set to "yes", the interpreter's window opens filling the entire screen. |
| FontName=[font] | Sets the font used for proportional text to the given font name, e.g. Times New Roman. |
| FixedFontName=[font] | Sets the font used for fixed width text to the given font name. |
| FontSize=[size] | Sets the size of the fonts to the given value, measured in points. |
| FontFile=[filename] | The name of a font file (usually ending in ".ttf") to load fonts from. |