A third way of operating Metafont is proof mode: if the proofing variable is positive then the bitmap font file also contains additional information provided via special commands, in particular the positions and names of points the font designer considered important for the design. If using the separate gftodvi utility to generate enlarged images of the font glyphs, this information from specials is included; point positions are not limited to pixel resolution.
A third way of operating Metafont is proof mode if the proofing variable is positive then the bitmap font file also contains additional information provided via special commands in particular the positions and names of points the font designer considered important for the design If using the separate gftodvi utility to generate enlarged images of the font glyphs this information from specials is included; point positions are not limited to pixel resolution