# Nodes does not align at the same height on tikz

How can I align these nodes with text?

I tried this, drawing nodes at the same height, but are not aligned

\documentclass[a4paper,12pt]{article}
\usepackage{tikz}

\begin{document}
\begin{tikzpicture}

\draw[very thick] (0,7) -- (14,7);
\draw (2.5,6.5) node[right] {Modelo de transporte de Krampf Lines Railway};
\draw[very thick] (0,6) -- (14,6);

\coordinate (A1) at (2,5);
\coordinate (A2) at (4.5,5);
\coordinate (A3) at (7,5);
\coordinate (A4) at (9.5,5);
\coordinate (A5) at (12,5);

\coordinate (B1) at (2,3.5);
\coordinate (B2) at (4.5,3.5);
\coordinate (B3) at (7,3.5);
\coordinate (B4) at (9.5,3.5);
\coordinate (B5) at (12,3.5);

\coordinate (C1) at (2,2);
\coordinate (C2) at (4,2);
\coordinate (C3) at (6,2);
\coordinate (C4) at (8.5,2);
\coordinate (C5) at (10,2);

\draw (A1) -- (A5);
\draw (B1) -- (B5);
\draw (C1) -- (C5);

\draw (A1) -- (B1);
\draw (A2) -- (B2);
\draw (A3) -- (B3);
\draw (A4) -- (B4);

\draw (3.25,5.1) node[above] {Coal Valley};
\draw (5.75,5.1) node[above] {Coaltown};
\draw (8.25,5.1) node[above] {Coal Junction};
\draw (10.75,5.1) node[above] {Coalsburg};

\draw (3.25,5.2) -- (12,5.2);

\draw (B1) node[above right] {$x_{11}$};
\draw (A2) node[below left] {$400$};

\draw (B2) node[above right] {$x_{12}$};
\draw (A3) node[below left] {$240$};
\end{tikzpicture}
\end{document}


Welcome to TeX.SE. The default is that nodes provide 0pt depth for text added to the node. This means that the baselines vary if we do not add some depth when we use letters with descenders like y and g.

The simple fix is to apply text depth globally with a tikzset command like this: \tikzset{every node/.append style={text depth=0.4ex}}.

\documentclass[a4paper,12pt]{article}
\usepackage{tikz}
\tikzset{every node/.append style={text depth=0.4ex}} %<- added this

\begin{document}
\begin{tikzpicture}

\draw[very thick] (0,7) -- (14,7);
\draw (2.5,6.5) node[right] {Modelo de transporte de Krampf Lines Railway};
\draw[very thick] (0,6) -- (14,6);

\coordinate (A1) at (2,5);
\coordinate (A2) at (4.5,5);
\coordinate (A3) at (7,5);
\coordinate (A4) at (9.5,5);
\coordinate (A5) at (12,5);

\coordinate (B1) at (2,3.5);
\coordinate (B2) at (4.5,3.5);
\coordinate (B3) at (7,3.5);
\coordinate (B4) at (9.5,3.5);
\coordinate (B5) at (12,3.5);

\coordinate (C1) at (2,2);
\coordinate (C2) at (4,2);
\coordinate (C3) at (6,2);
\coordinate (C4) at (8.5,2);
\coordinate (C5) at (10,2);

\draw (A1) -- (A5);
\draw (B1) -- (B5);
\draw (C1) -- (C5);

\draw (A1) -- (B1);
\draw (A2) -- (B2);
\draw (A3) -- (B3);
\draw (A4) -- (B4);

\draw (3.25,5.1) node[above] {Coal Valley};
\draw (5.75,5.1) node[above] {Coaltown};
\draw (8.25,5.1) node[above] {Coal Junction};
\draw (10.75,5.1) node[above] {Coalsburg};

\draw (3.25,5.2) -- (12,5.2);

\draw (B1) node[above right] {$x_{11}$};
\draw (A2) node[below left] {$400$};

\draw (B2) node[above right] {$x_{12}$};
\draw (A3) node[below left] {$240$};
\end{tikzpicture}
\end{document}