Cfrgtkky

I have the following code with two nodes:

documentclass[crop,tikz]{standalone}

begin{document}



usetikzlibrary{positioning,calc}

tikzstyle{block} = [draw, rectangle, minimum height=1cm, minimum width=1cm, outer sep=0pt]



begin{tikzpicture}

node [block,align=center](A) { shortstack{double \ type} };

node [block,align=center,right=1.5cm of A](B) { shortstack{single \ type} };



end{tikzpicture}

end{document}

Because the content of node A has no "long" character that ranges below the baseline, the distance between the two lines is closer than in the second node B. There, the "g" character ranges below the baseline and therefore it seems that additional space is used and the two blocks are not aligned.

I could fix that by including a vphantom{g} into node A. However, that would make the line spacing large in both blocks.

Instead, I want that the line space is small, just as if there were no characters that range below the baseline.

Is it possible to somehow "ignore" these characters?

You should just smash the [b]aseline of those words/phrases:

documentclass{article}



usepackage{tikz,amsmath}



begin{document}



usetikzlibrary{positioning,calc}

tikzstyle{block} = [draw, rectangle, minimum height=1cm, minimum width=1cm, outer sep=0pt]



begin{tikzpicture}

  node [block,align=center](A) {shortstack{double \ type}};

  node [block,align=center,right=1.5cm of A](B) {shortstack{smash[b]{single} \ type}};

end{tikzpicture}



end{document}

amsmath provides the extended version of smash.

Another method is to use the NextLine macro instead of \. This eliminates the need to go back and change things just because you changed the text:

References

• How to make mdframed ignore descenders in last line

Code:

documentclass[crop,tikz, border=2pt]{standalone}

begin{document}



%% https://tex.stackexchange.com/a/51406/4301

newcommand*{IgnodeDescenders}{-dimexprdpstrutbox+baselineskip}

newcommand*{NextLine}{strut\[IgnodeDescenders]}



usetikzlibrary{positioning,calc}

tikzstyle{block} = [draw, rectangle, minimum height=1cm, minimum width=1cm, outer sep=0pt]



begin{tikzpicture}

node [block,align=center](A) {shortstack{doubleNextLine type}};

node [block,align=center,right=1.5cm of A](B) {shortstack{singleNextLine type}};



end{tikzpicture}

end{document}

This is discussed at length in the pgfmanual on p. 65. The upshot is that you can add a suitable text depth.

documentclass[crop,tikz]{standalone}

begin{document}



usetikzlibrary{positioning,calc}

tikzset{block/.style={draw, rectangle, minimum height=1cm, minimum width=1cm,

outer sep=0pt,text height=3ex,text depth=.25ex}}



begin{tikzpicture}

node [block,align=center](A) { double \ type };

node [block,align=center,right=1.5cm of A](B) {single \ type };

draw[red] (A.west) -- (B.east);

end{tikzpicture}

end{document}

The red line is only to guide the eye.