How to change fonts in Eagle

Use command:   

    display torig borig;   # Display the top and bottom origins

    group all;             # Group everything

    smash (C>0 0);         # Smash everything in the group

    display none tname bname tval bval; # OPTIONAL: limit changes the names and values

    group all;             # Group everything including smashed texts.

    change font vector (C>0 0); # Change the font to a vector font

    change size 50mil (C>0 0); # Change the font size

    change ratio 15 (C>0 0); # Change the width:height ratio

    display last;