circuitikz
How can I change the style for all labels (and current/voltage as well) in circuitikz?
\documentclass{article}
\usepackage{circuitikz}
\begin{document}
\begin{circuitikz}
\draw (0,0) node[ground]{} to [C, l_=$C_1$] ++(0,2) to [L, l_=$L_1$]
++(0,2) to [short,-*, i>=$I_1$] ++ (3,0) coordinate(l2);
\end{circuitikz}
\end{document}
Here I want to make C_1, L_1, I_1 larger. I tried with \ctikzset{every label/.style={font=\Large}} but with no effect.
Thank you.
I am not quite sure what you are asking.
If you want to change rounded terminal's polarity always:
\draw (0,0) to [battery=\SI{9}{V}] (3,0)
to [pC,v^>=$v_C$] (6,0); %<--- change v= to v^>=
But if you want to change the polarity, then reverse the co-ordinates like this:
\documentclass{article}
\usepackage[american voltages,siunitx]{circuitikz}
\begin{document}
\begin{circuitikz}
\draw (0,0) to [battery=\SI{9}{V}] (3,0) ;
\draw (6,0) to [pC, v=$v_C$] (3,0) ; % <-----------co-ordinates reversed here
\end{circuitikz}
\end{document}
Problem 1: Positioning Labels
This can be solved quite easily since circuitikz defines also l^ and l_ to locate the labels. In this case l_ is the option needed.
Problem 2: Scaling components
The options scale and transform shape are always a way since circuitikz exploits TikZ, but there are also specific keys to change size of the components; you find some examples in the documentation 6.2 Components size.
To get thicker lines, one can always use the standard TikZ keys thick, very thick and so on or line width.
Here is an example which more or less answers to all the request (just illustrative: the combination of thick with that bipoles' length is awful):
\documentclass{article}
\usepackage{circuitikz}
\usepackage{siunitx}
\begin{document}
\begin{circuitikz}[scale=0.8, transform shape,thick]
\ctikzset{bipoles/length=0.85cm}
\draw (5,0) --
(5,-2) to[battery, l=$1.5\ V$, i=$\SI{3}{A}$]
(0,-2) --
(0,0) to[resistor, l= $R_2$ ] (5,0);
\draw
(3.5,1.5) to[resistor, l_=$R_3$]
(1.5,1.5)--
(1.5,-1.1) to[resistor, l= $R_1$ ]
(3.5,-1.1) -- (3.5,1.5);
\end{circuitikz}
\end{document}
The result:
For problem 3, unfortunately I can not point a better resource.
Best Answer
There is a section in the manual: https://texdoc.org/serve/circuitikz/0#subsection.5.6
Basically, you have keys to change the 4 types of labels independently (they're not label in plain TikZ sense!):