The microtype package

IMPLEMENTATION: Package options 125\MT@saved@setupfont4090 {Use either `true’ or `false’}%4091 }%4092 }%4093 \ifnum\@tempcnta>\m@ne4094 #2\relax4095 \fi4096 }%4097 }%4098 }%4099 }We cannot simply let \MT@tracking relax, since this may select the already letterspacedfont instance.4100 \MT@define@optionX@{tracking}{\ifnum\@tempcnta=\z@ \let\MT@tracking\MT@set@tr@zero4101 \else \let\MT@tracking\MT@tracking@ \fi}4102 \MT@define@optionX@{spacing}{\pdfadjustinterwordglue\@tempcnta}4103 \MT@define@optionX@{kerning}{\pdfprependkern\@tempcnta4104 \pdfappendkern \@tempcnta}4105 }{4106 4107 Disable for older pdfTEX versions and forTEX and LuaTEX.4108 \define@key{MTX}{tracking}[true]{\MT@warning{Ignoring tracking setup}}4109 }4110 \define@key{MTX}{kerning}[true]{\MT@warning{Ignoring kerning setup}}4111 \define@key{MTX}{spacing}[true]{\MT@warning{Ignoring spacing setup}}4112 }4113 \define@key{MTX}{activate}[true]{%4114 \setkeys{MTX}{protrusion={#1}}%4115 \setkeys{MTX}{expansion={#1}}%4116 }4117 Disable everything – may be used as a work-around in case setting up fonts doesn’twork in certain environments. (Undocumented.)4118 4119 \let\MT@saved@setupfont\MT@setupfont4120 \define@key{MTX}{disable}[]{%4121 \MT@info{Inactivate `\MT@MT’ package}%4122 \let\MT@setupfont\relax4123 }4124 \define@key{MTX}{enable}[]{%4125 \MT@info{Reactivate `\MT@MT’ package}%4126 \let\MT@setupfont\MT@saved@setupfont4127 }4128 EX\MT@ProcessOptionsWithKV14.4.6 Processing the optionsParse options.4129 4130 \MT@requires@latex1{4131 \def\MT@ProcessOptionsWithKV#1{%4132 \let\@tempc\relax4133 \let\MT@temp\@empty4134 \MT@requires@latex2{4135 \MT@map@clist@c\@classoptionslist{%4136 \def\CurrentOption{##1}%4137 \MT@ifdefined@n@T{KV@#1@\expandafter\MT@getkey\CurrentOption=\@nil}{%4138 \edef\MT@temp{\MT@temp,\CurrentOption,}%4139 \@expandtwoargs\@removeelement\CurrentOption4140 \@unusedoptionlist\@unusedoptionlist