I make an example here: %% BEGIN %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \setupinteraction[state=start] \setupcolors[state=start] \definecolor[BackBrand][black] \definecolor[Brand][white] \newcount\ICfdigit \newif\ifDoZero \DoZerotrue \newif\ifDoOne \DoOnetrue \newif\ifDoTwo \DoTwotrue \newif\ifDoThree \DoThreetrue \newif\ifDoFour \DoFourtrue \newif\ifDoFive \DoFivetrue \newif\ifDoSix \DoSixtrue \newif\ifDoSeven \DoSeventrue \newif\ifDoEight \DoEighttrue \newif\ifDoNine \DoNinetrue \newif\ifDoOtherDig \DoOtherDigtrue \defineregister[IndexCode][IndexCodes] \def\ICTextCommand#1{% \getfirstcharacter{#1}\ICfdigit=\firstcharacter% \ifcase\firstcharacter %%\ICfdigit %% 0 \ifDoZero\global\DoZerofalse\ICHeadLetterCommand{0}\fi \or%% 1 \ifDoOne\global\DoOnefalse\ICHeadLetterCommand{1}\fi \or%% 2 \ifDoTwo\global\DoTwofalse\ICHeadLetterCommand{2}\fi \or%% 3 \ifDoThree\global\DoThreefalse\ICHeadLetterCommand{3}\fi \or%% 4 \ifDoFour\global\DoFourfalse\ICHeadLetterCommand{4}\fi \or%% 5 \ifDoFive\global\DoFivefalse\ICHeadLetterCommand{5}\fi \or%% 6 \ifDoSix\global\DoSixfalse\ICHeadLetterCommand{6}\fi \or%% 7 \ifDoSeven\global\DoSevenfalse\ICHeadLetterCommand{7}\fi \or%% 8 \ifDoEight\global\DoEightfalse\ICHeadLetterCommand{8}\fi \or%% 9 \ifDoNine\global\DoNinefalse\ICHeadLetterCommand{9}\fi \else \ifDoOtherDig\global\DoOtherDigfalse\ICHeadLetterCommandSym{$\bigstar$}{*}\fi \fi% \hskip1sp#1% }%% \def\ICPageCommand#1{\relax} % \def\ICHeadLetterCommand#1{% \blank \framed[strut=no,width=2em,height=2em,background=color,backgroundcolor=BackBrand,foregroundcolor=Brand]{\bfb #1\pagereference[IndexCode:NR#1]}\par\nobreak} % \def\ICHeadLetterCommandSym#1#2{% \blank \framed[strut=no,width=2em,height=2em,background=color,backgroundcolor=BackBrand,foregroundcolor=Brand]{\bfb #1\pagereference[IndexCode:NR#2]}\par\nobreak} \def\ICHeadLetterOtherCommand#1{\relax} %%%%% \setupregister[IndexCode][n=2, align=yes, balance=no, symbol=1, %distance=0pt, %expand=no, %distance=0bp, %partnumber=no, %indicator=yes, %% interaction=text, textstyle={\tfa}, textcommand={\ICTextCommand}, %% pagecommand={\ICPageCommand}, command={\ICHeadLetterOtherCommand},% ] \def\ICLetterEntry#1{% \bTD \doifreferencepermittedelse{IndexCode:NR#1}{% \goto{\framed[strut=no,width=2em,height=2em,background=color,backgroundcolor=BackBrand,foregroundcolor=Brand]{\bfb #1}}[IndexCode:NR#1]} {\framed[strut=no,width=2em,height=2em,background=color,backgroundcolor=BackBrand,foregroundcolor=Brand]{\bfb}} \eTD% } \def\ICLetterEntrySymbol#1#2{% \bTD \doifreferencepermittedelse{IndexCode:NR#2}{% \goto{\framed[strut=no,width=2em,height=2em,background=color,backgroundcolor=BackBrand,foregroundcolor=Brand]{\bfb #1}}[IndexCode:NR#2]} {\framed[strut=no,width=2em,height=2em,background=color,backgroundcolor=BackBrand,foregroundcolor=Brand]{}} \eTD% } \def\PutICLetterEntry{% \setupTABLE[frame=off] \bTABLE \bTR \ICLetterEntry{0}\ICLetterEntry{1}\ICLetterEntry{2}\ICLetterEntry{3}% \ICLetterEntry{4}\ICLetterEntry{5}\ICLetterEntry{6}\ICLetterEntry{7} \eTR \bTR \ICLetterEntry{8}\ICLetterEntry{9}\ICLetterEntrySymbol{$\bigstar$}{*}% \eTR\eTABLE } \starttext \IndexCode{00328273} {00328273} \par \IndexCode{12328273} {12328273} \par \IndexCode{2328273} {2328273} \par \IndexCode{3328273} {3328273} \par \IndexCode{3334328273} {3334328273} \par \IndexCode{4} {4} \par \IndexCode{5553} {5553} \par \IndexCode{644328273} {644328273} \page \IndexCode{844328273} {844328273} \par \IndexCode{944328273} {944328273} \par \IndexCode{944328273} {944328273} \par \IndexCode{944328273} {944328273} \par \page {\tfd TEST }\par \PutICLetterEntry\par \page \placeIndexCode \stoptext %% END %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

you can file a feature request to treat numbers 'as characters'

Hans

Sorry, I don't understand that.