6 \usepackage{amssymb}

     6 \usepackage{amssymb}

     7 \usepackage{amsmath}

     7 \usepackage{amsmath}

     8 \usepackage{menukeys}

     8 \usepackage{menukeys}

     9 \definecolor{darkblue}{rgb}{0,0,0.6}

     9 \definecolor{darkblue}{rgb}{0,0,0.6}

    10 \usepackage[colorlinks=true,urlcolor=darkblue,linkcolor=darkblue]{hyperref}

    10 \usepackage[colorlinks=true,urlcolor=darkblue,linkcolor=darkblue]{hyperref}

    11 

    12 

    12 \newcommand\grid[1]{%

    13 \newcommand\grid[1]{%

    13 \begin{tikzpicture}[baseline=(char.base)]

    14 \begin{tikzpicture}[baseline=(char.base)]

    14   \path[use as bounding box]

    15   \path[use as bounding box]

    15     (0,0) rectangle (1em,1em);

    16     (0,0) rectangle (1em,1em);