I was just figuring out how to cite multiple lines to same footnote. I use \usepackage{threeparttable} to do so. However, the table I am making is quite large (over 70 lines), and this seems to have messed up with the \centering command. The table has shifted to the right.
Now, I am using resizebox to fit the whole thing into one page, and I am not comfortable picking random \renewcommand because I am not always sure what that could do to my specific case.
The table is still all in within the page, but I would really love to have it centered.
Here is minimum viable code, and part of the table.
\documentclass[a4paper,12pt,twoside,BCOR=10mm]{scrbook}
\usepackage[utf8]{inputenc}
\usepackage[icelandic]{babel}
% \usepackage{t1enc}
\usepackage[T1]{fontenc}
\usepackage[dvipsnames]{xcolor}
\usepackage{graphicx,booktabs}
\usepackage[intoc]{nomencl}
\usepackage{enumerate,color}
\usepackage{url}
\usepackage{appendix}
\usepackage{float}
\usepackage{eso-pic}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{longtable}
\usepackage{acronym}
\usepackage{nicematrix}
\usepackage{makecell}
% \usepackage{tablefootnote}
\usepackage{threeparttable}
%\usepackage[sf,normalsize]{subfigure}
\usepackage[format=plain,labelformat=simple,labelsep=colon]{caption}
\usepackage{placeins}
\usepackage{tabularx}
\usepackage{multirow}
\usepackage{adjustbox}
\usepackage{subcaption}
%\usepackage{subfig}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\usepgfplotslibrary{external}
% Packages used for title page layout
\usepackage{tikz}
\usetikzlibrary{positioning}
\usepackage[pdfborder={0 0 0}]{hyperref}
% \usepackage{scrextend}
\begin{document
\begin{table}
\centering
{\small\renewcommand{\arraystretch}{.8}
\caption{Spá um raforkunotkun, forgangsorka og skerðanleg orka. Almenn notkun að meðtöldum dreifitöpum og núverandi og samþykktir nýir stórnotendur. \label{table:Orkuspá}}
\resizebox{!}{.31\paperheight}{
\begin{threeparttable}
\begin{NiceTabular}{lcccccccccc}
\hline
\Block{2-1}{Ár} & \Block{1-2}{Úttekt frá dreifikerfinu\ forgangs- og skerðanleg\ orka með dreifitöpum} & & \Block{1-2}{Úttekt frá\ flutningskerfinu} & & \Block{1-2}{Flutningstöp} & & \Block{1-2}{Úttekt frá \ vinnslufyrirtækjum} & & \Block{1-2}{Samtals} \
& Orka GWh & Afl MW & Orka GWh & Afl MW & Orka GWh & Afl MW & Orka GWh & Afl MW & Orka GWh & Afl MW \
\hline
2015 \tnote{1} & 3.604,74 & 618,46 & 14.356,34 & 1.685,89 & 369,56 & 57,11 & 468,32 & 75,40 & 18.798,96 & 2.383,25 \
2016 \tnote{1} & 3.383,99 & 590,10 & 14.334,19 & 1.695,96 & 360,42 & 57,05 & 470,86 & 71,46 & 18.549,46 & 2.378,51 \
2017 \tnote{1} & 3.519,13 & 608,86 & 14.869,95 & 1.750,87 & 373,07 & 61,49 & 476,38 & 84,74 & 19.238,53 & 2.443,61 \
2018 \tnote{1} & 3.682,07 & 623,26 & 15.259,88 & 1.838,28 & 398,09 & 70,47 & 489,75 & 70,71 & 19.829,79 & 2.519,53 \
2019 \tnote{1} & 3.506,86 & 596,63 & 15.145,31 & 1.829,48 & 365,82 & 63,40 & 476,84 & 85,11 & 19.494,83 & 2.495,07 \
2020 \tnote{1} & 3.473,77 & 596,83 & 14.830,70 & 1.790,95 & 353,09 & 60,54 & 469,74 & 72,27 & 19.127,30 & 2.408,28 \
2021 & 3.688,10 & 630,47 & 15.539,59 & 1.865,64 & 397,70 & 67,72 & 479,82 & 73,82 & 20.105,21 & 2.584,89 \
2022 & 3.785,98 & 647,81 & 16.099,28 & 1.875,76 & 416,40 & 69,68 & 490,14 & 75,41 & 20.791,80 & 2.615,29 \
\hline
\end{NiceTabular}
\begin{tablenotes}
\item[1] Rauntölur
\end{tablenotes}
\end{threeparttable}}}
\end{table}
\end{document}
I am sorry if I come off as dry, I am just tired after long day, and that same footnote over many lines took way too much time to figure out.
\scriptsize\tabcolsep=2pt(after \caption). – John Kormylo Apr 25 '23 at 02:04\resizeboxto cram the entire 11-column/70-row table into a single page pretty much guarantees that the font size will be so minuscule as to make material indecipherable. Would you be willing to render the table in landscape mode and have it span several pages? – Mico Apr 25 '23 at 03:31