The microtype package

IMPLEMENTATION: Font setup 80\MT@textls\MT@letterspace@\MT@ls@adjust\MT@ls@adjust@empty\MT@ls@adjust@relax\MT@ls@set@ls\MT@ls@too@large\MT@outer@kern\MT@tr@set@okern\MT@tr@set@okern@2061 2062 \DeclareRobustCommand\textls{%2063 \@ifstar{\let\MT@ls@adjust@\MT@ls@adjust@empty\MT@textls}%2064 {\let\MT@ls@adjust@\MT@ls@adjust@relax\MT@textls}%2065 }This is now almost L A TEX’s \DeclareTextFontCommand, with the difference that weadjust the outer spacing and kerning also for \lsstyle, while L A TEX’s text switchesdon’t bother about italic correction.2066 \newcommand\MT@textls[2][]{%2067 \ifmmode2068 \nfss@text{\MT@ls@set@ls{#1}\lsstyle#2}%2069 \else2070 \hmode@bgroup2071 \MT@ls@set@ls{#1}%2072 \lsstyle #2%2073 \expandafter2074 \egroup2075 \fi2076 }Set current letterspacing amount and outer kerning. This has to be done inside thesame group as the letterspacing command.2077 \def\MT@ls@adjust@empty{\let\MT@ls@adjust\@empty}2078 \def\MT@ls@adjust@relax{\let\MT@ls@adjust\relax}2079 \def\MT@ls@set@ls#1{%2080 \MT@ifempty{#1}%2081 {\let\MT@letterspace@\@undefined}%2082 {\KV@@sp@def\MT@letterspace@{#1}%2083 \edef\MT@letterspace@{\number\MT@letterspace@}%2084 \MT@ls@too@large\MT@letterspace@}%2085 \MT@ls@adjust@2086 }Test whether letterspacing amount is too large.2087 \def\MT@ls@too@large#1{%2088 \ifnum#1>\MT@tr@max2089 \MT@warning{Maximum for option `letterspace’ is \number\MT@tr@max}%2090 \let#1\MT@tr@max2091 \else2092 \ifnum#1