Superscripts size in tikz label

Question

The size of the superscripts (2) should be smaller, how can I fix that?

\documentclass[border=5pt]{standalone}
\usepackage{sansmath}
\usepackage{tikz,pgfplots}     
\usetikzlibrary{angles, arrows.meta,    % new
                quotes}                 % new
\definecolor{lava}{rgb}{0.81, 0.06, 0.13}
\definecolor{myblue}{rgb}{0.0, 0.30, 0.60}
   \usepackage{amsmath,amsthm, amssymb, latexsym}
%ENEC250071
\begin{document}
\begin{tikzpicture}[
ang/.style = {draw, Straight Barb-, anchor=west,
              angle radius = 8mm, angle eccentricity=1.25},
arr/.style = {cap=round,-Straight Barb},
dot/.style = {circle, fill, minimum size=3pt,inner sep=0pt},
every edge quotes/.style = {auto, font=\footnotesize, sloped},
every label/.style       = {inner sep=1pt},
                       font=\sffamily ]
% defining radius points
\coordinate (O) at (0,0);
\node (n2)    at (120:2.5) {};
\node (n1)  at ( -120:2.5) {};
\node (n3)    at (180:2.5) {};
\node (n4)    at (0:2.5) {};
    \path[draw=black, thick, arr] 
    (O) to  (n2.center);
\path[draw=black, thick, arr] 
    (O) to  (n1.center);
\path[draw=black, thick, arr,dashed] 
(n1) to  (n3.center);

\path[draw=black, thick, arr,dashed] 
(n2) to  (n3.center);

  \path[draw=black, thick, arr,dashed,lava] 
(O) to  (n3.center); 

  \path[draw=black, thick, arr,dashed,myblue] 
(O) to  (n4.center); 


\node[above] (n3)  at ( 180:1.25) {\tiny $  \mathbf{I}{b}+\mathbf{I}{c    }$};
\node[] (n0)  at ( 0:2.7) {};
\node[] (ny)  at ( 90:2.7) {};
% vector
\path[draw=black] 
(O) to  (n0.center);
    \path[draw=black] 
(O) to  (ny.center);
    \path[draw=black] 
(O) to  (n0.center);


\node[right] ()  at ( 0:2.75) {\tiny X};

    \node[above] ()  at ( 90:2.75) {\tiny Y};
% angle
\pic [ang, -Straight Barb, "\tiny $120^\circ$"] {angle = n0--O--n2};
\pic [ang, Straight Barb-, "\tiny $-120^\circ$"] {angle = n1--O--n0};
\node[below] at (n1) {\tiny $\mathbf{I}{b}$};

\node[above] at (n2) {\tiny $\mathbf{I}{c}$};
\node[] at (2.5,2.5){
$\tiny \begin{aligned}
\Vert \mathbf{I}_a \Vert^2=&\Vert \mathbf{I}_b \Vert^2+2\mathbf{I}_b . \mathbf{I}_c+\Vert \mathbf{I}_b \Vert^2,\
=&\Vert \mathbf{I}_b \Vert^2+2 \cos(120^\circ) \Vert \mathbf{I}_b \Vert \Vert \mathbf{I}_c \Vert+\Vert \mathbf{I}_b \Vert^2 ,\
=&\mathbf{I}^2+2 \cos(120^\circ)  (\mathbf{I})(\mathbf{I})+\mathbf{I}^2 ,\
=&\mathbf{I}^2-\mathbf{I}^2+\mathbf{I}^2 ,\
=&\mathbf{I}^2, \
\Vert \mathbf{I}_a \Vert =&\mathbf{I}.\
\end{aligned}$ };
    \end{tikzpicture}
\end{document}

It is not fully clear from your question if you want all superscripts to be smaller or just a few specific superscripts. If you want all superscripts to be smaller then you can look at https://tex.stackexchange.com/questions/262295/make-subscript-size-smaller-always (which is for subscripts but the solutions apply to superscripts too). — Marijn, Dec 03 '20 at 08:33

Zarko · Accepted Answer · 2020-12-03T09:58:17.533

I would rather increase font size in math from \tiny to \scriptsize. In this case for sub/super scripts is available \tiny size, so their will looks smaller. Of course you still have option to consider @Marijn comment.

Off-topic: I took a liberty and wee bit correct your MWE where I use scriptsize fonts for math in your image. You may find result satisfactory:

\documentclass[border=5pt]{standalone}
\usepackage{sansmath}
\usepackage{pgfplots}
\usetikzlibrary{angles, arrows.meta,    % new
                quotes}                 % new
\definecolor{lava}{rgb}{0.81, 0.06, 0.13}
\definecolor{myblue}{rgb}{0.0, 0.30, 0.60}
\usepackage{mathtools,amsthm, amssymb, latexsym}
\DeclarePairedDelimiter\norm{\lVert}{\rVert}
%ENEC250071
\begin{document}
    \begin{tikzpicture}[
     nodes = {font=\scriptsize},
ang/.style = {draw, Straight Barb-Straight Barb, anchor=west,
              angle radius = 8mm, angle eccentricity=1.1},
arr/.style = {cap=round, -{Straight Barb[angle=45:2pt 3]}},
dot/.style = {circle, fill, minimum size=3pt,inner sep=0pt},
every edge quotes/.style = {auto, font=\footnotesize, sloped},
every label/.style       = {inner sep=1pt},
                       font=\sffamily ]
% defining radius points
\coordinate (O);
\coordinate (n1)  at (-120:2.5);
\coordinate (n2)  at ( 120:2.5);
\coordinate (n3)  at ( 180:2.5);
\coordinate (n4)  at (   0:2.5);
%
\coordinate (nx)  at (   0:2.7);
\coordinate (ny)  at (  90:2.7);
% axis
\draw[very thin]    (O) to  (ny) node[above] {Y} 
                    (O) to  (nx) node[right] {X};
% vectors
\draw[thick, arr]   (O)  to  (n2) node[above] {$\mathbf{I}{c}$};
\draw[thick, arr]   (O)  to  (n1) node[below] {$\mathbf{I}{b}$};
\draw[thick, arr, dashed]   (n1) to  (n3);
\draw[thick, arr, dashed]   (n2) to  (n3);
\path[draw=lava, thick, arr, dashed] 
                    (O) to node[above] {$\mathbf{I}{b}+\mathbf{I}{c}$}   (n3);
\draw[thick, arr, dashed, myblue]   (O) to  (n4);
% angle
\pic [ang, "$ 120^\circ$"] {angle = nx--O--n2};
\pic [ang, "$-120^\circ$"] {angle = n1--O--nx};
% math description
\node[above right] at (0,1){$\begin{aligned}
    \norm{\mathbf{I}_a}^2 
    & = \norm{\mathbf{I}_b}^2 + 2\mathbf{I}_b\cdot \mathbf{I}_c + \norm{\mathbf{I}_b}^2,\
    & = \norm{\mathbf{I}_b}^2+2 \cos(120^\circ) \norm{\mathbf{I}_b} \norm{\mathbf{I}_c} + \norm{\mathbf{I}_b}^2 ,\
    & = \mathbf{I}^2+2 \cos(120^\circ)  (\mathbf{I})(\mathbf{I})+\mathbf{I}^2 ,\
    & = \mathbf{I}^2-\mathbf{I}^2+\mathbf{I}^2 ,\
    & = \mathbf{I}^2, \
    \norm{\mathbf{I}_a} 
    & = \mathbf{I}.
                            \end{aligned}$ };
    \end{tikzpicture}
\end{document}

Superscripts size in tikz label

1 Answers1