GOWrite 2 allows changes to board fonts.
Move numbers above 100 are somewhat difficult to produce in well-readable way. Light and condensed (or ultra condensed) fonts tend to produce best results. However GOWrite 2 does not include such font, as such high quality font is not available freely.
Windows users may have quite good font "Arial Narrow" installed.
GOWrite 2.2 and before: If your system has suitable font, you can select it for use in Options -> Fonts dialog.
GOWrite 2.3 and before: GOWrite uses "Arial Narrow" (if present in system). You can select other fonts in Options -> Layout and Graphics options.