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Hi.
I'm trying to create a 18 x 9 path of grid, because I want to create a periodic table by putting a chemical element on every position of grid.

How can I make the grid to start from the lower left corner of the page?

(It's in the draw phase now. Later I'll make it a path.)

Thank you ...

Hi.
I created my books on LaTeX and they work perfect.
Some time ago, one package made an update and when I tried to compile my books, some errors showed up and it couldn't be compiled.
After 1-2 days, this package updated again (obviously it had problems) and everything was working well again.
I'd ...

Thanks for your reply.

I would prefer to have a customized arrow created with \tikz.
My problem is that I can't make the two horizontal lines to "stop" when they meet the arrow tip.
Also, I'd like the space between the two horizontal lines to be transparent.

Hi,
is there a way to customize the \Rightarrow and \Leftrightarrow to match with my customized rightarrow?
mwe.png

As you can see the rightarrow between A and B is perfect. But the other two arrows are not.

\documentclass[a4paper,11pt]{book}
\usepackage{tikz}
\usetikzlibrary{positioning,arrows ...

Oh, that was too complex for me to do.
Thank you very much, Stefan.

That's a solution, sure, but I need to shorten only the length of the arrow, not to shrink it.
Thank you again.

Pretty good, but this way the uparrow and downarrow have a little bit larger length than they should.
Screen Shot 2018-06-23 at 16.05.12.png
Since the length of the arrows is defined in preamble with:
\ExplSyntaxOn
\cs_set:Npn \__mhchem_arrow_options_minLength:n { {1.25em} }
\ExplSyntaxOff
is it ...

Hi.
I'm using the mhchem package and I'd like to have custom arrows in my text.
Rightarrow, leftarrow and doublearrow are fine with my custom design, but why uparrow and downarrow are not shown with my custom design?
Screen Shot 2018-06-21 at 18.55.57.png
My MWE:
\documentclass[a4paper,11pt]{book ...

Nice. Thanks.

Hi.
I have created this arrow box,
Before.png
with this MWE:
\documentclass[a4paper,11pt,openright]{book}
\usepackage{tikz}
\usetikzlibrary{positioning, shapes.arrows}

\begin{document}

\begin{tikzpicture}
\tikzset{box/.style={arrow box, draw=blue}};
\node[box, arrow box arrows={west:2cm}] at (0 ...