Cfrgtkky

I have successfully added a grey box (given minor revision) in the margin of each page with the number of the chapter using the code from "Show current chapter number on each page margin".
I'm trying to remove the chapter number boxes from the first page of every chapter, e.g. as discussed in "Edit box with current chapter number on each page margin".

However, in the latter post, I cannot find the piece of code responsible for this 'first page chapter' box deletion.
If tried by adding the makeatletter and makeatother parts, but see no changes in the output. also cleartooddpage[thispagestyle{empty}] does not work.

Below you can find my code. Any suggestions?

documentclass[10pt,twoside,parskip=half]{scrbook} % Document class for PhD manuscript

linespread{1.1}

usepackage[

   paperwidth=170mm,

   paperheight=240mm,

   top=2.5cm, bottom=3cm,

   inner=30mm, outer=25mm,

   heightrounded=true

]{geometry}



% Gray boxes for chapter numbering on pages

usepackage[contents={},opacity=1,scale=1,color=white]{background}

usepackage{tikzpagenodes}

usepackage{totcount}

usetikzlibrary{calc}



newififMaterial



newlengthLabelSize

setlengthLabelSize{2.5cm}

AtBeginDocument{%

regtotcounter{chapter}

%setlengthLabelSize{dimexprtextheight/totvalue{chapter}relax} 

% Line above commented out as this line of code resulted in "results out of range"

ifdimLabelSize>2.5cmrelax

  globalsetlengthLabelSize{2.5cm}

fi

}



newcommandAddLabels{%

    Materialtrue%

    AddEverypageHook{%

        ifMaterial%

        ifoddvalue{page} %

        backgroundsetup{

          angle=90, position={current page.east|-current page text area.north  east},

          vshift=8pt, hshift=-thechapter*LabelSize,

          contents={%

          tikznode[fill=gray!30,anchor=west,text width=LabelSize,

            align=center,text height=15pt,text depth=10pt,font=largesffamily] {thechapter};  }%

        }

         else

         backgroundsetup{

          angle=90, position={current page.west|-current page text area.north west},

          vshift=-8pt, hshift=-thechapter*LabelSize,

          contents={%

          tikznode[fill=gray!30,anchor=west,text width=LabelSize,

            align=center,text height=15pt,text depth=10pt,font=largesffamily] {thechapter};  }%

         }

     fi

     BgMaterial%

     elserelaxfi}%

}





newcommandRemoveLabels{Materialfalse}

The following suggestion bases on an example in the appendix of the KOMA-Script book (German):

documentclass[10pt,twoside,parskip=half]{scrbook} % Document class for PhD manuscript

linespread{1.1}

usepackage[

   paperwidth=170mm,

   paperheight=240mm,

   top=2.5cm, bottom=3cm,

   inner=30mm, outer=25mm,

   heightrounded=true

]{geometry}



usepackage{graphicx}

usepackage{xcolor}

usepackage{scrlayer-scrpage}



% the following bases on an example in the KOMA-Script book:

newcommand*{firstchapterthumbskip}{.1paperheight}

newcommand*{lastchapterthumbskip}{firstchapterthumbskip}

newcommand*{chapterthumbheight}{2em}

newcommand*{chapterthumbwidth}{.1paperheight}

newcommand*{chapterthumbskip}{.1paperheight}

newcommand*{chapterthumbboxcolor}{gray!30}

newcommand*{chapterthumbcolor}{black}

newcommand*{chapterthumbformat}{thechapter}

newkomafont{chapterthumb}{normalfontLargesffamilycolor{chapterthumbcolor}}



makeatletter

newcommand*chapterthumb@box{%

  parbox[c][chapterthumbheight][c]{chapterthumbwidth}{%

      centeringusekomafont{chapterthumb}{chapterthumbformat}%

  }%

}

newcommand*{chapterthumbbox}{%

  if@mainmatter

    ifnumvalue{chapter}>z@

      ifnum value{chapterthumb}<z@

      else

        begingroup

          protected@edefreserved@a{chapterthumbformat}%

          ifxreserved@alastchapterthumbformatelse

            stepcounter{chapterthumb}%

            globalletlastchapterthumbformatreserved@a

          fi

          @tempcnta=numexpr 

            dimexpr 

              paperheight

              -firstchapterthumbskip

              -chapterthumbwidth

              -lastchapterthumbskip

            relax / dimexpr 

                       chapterthumbskip 

                     relax

            +1

          relax

          ifnum value{chapterthumb}<@tempcnta

          else

            setcounter{chapterthumb}{0}%

          fi

          vspace*{%

            dimexpr 

              firstchapterthumbskip

              + ( chapterthumbskip )

                * value{chapterthumb}%

              - baselineskip

            relax

          }par

          setlength{fboxsep}{0pt}%

          ifoddvalue{page}

            hfill

            makebox[0pt][r]{%

              rotatebox[origin=tr]{90}{%

                colorbox{chapterthumbboxcolor}{%

                  parbox[t][chapterthumbheight]{chapterthumbwidth}{%

                    chapterthumb@box

                    vskip3mm

                  }}}}%

          else

            hspace*{-3mm}%

            makebox[0pt][l]{%

              rotatebox[origin=tr]{90}{%

                colorbox{chapterthumbboxcolor}{%

                  parbox{chapterthumbwidth}{%

                    vskip3mm

                    chapterthumb@box

                  }}}}%

          fi

        endgroup

      fi

    fi

  fi

}

makeatother



newcounter{chapterthumb}

setcounter{chapterthumb}{10000}

newcommand*{lastchapterthumbformat}{relax}



DeclareNewLayer[%

  background,%

  outermargin,%

  contents=chapterthumbbox

]{chapterthumb}



newcommand*EnableChapterthumb{%

  IfLayerAtPageStyle{scrheadings}{chapterthumb}{}

    {AddLayersToPageStyle{scrheadings}{chapterthumb}}%

}

newcommand*DisableChapterthumb{%

  RemoveLayersFromPageStyle{scrheadings}{chapterthumb}%

}



EnableChapterthumb



usepackage{blindtext}% only for dummy text

begin{document}

tableofcontents

blinddocumentblinddocumentblinddocument

blinddocumentblinddocumentblinddocument

blinddocumentblinddocumentblinddocument

blinddocumentblinddocumentblinddocument

end{document}

Result: