# removes the box and adds black clickable links
\usepackage[colorlinks=true,citecolor=black,urlcolor=black,linkcolor=black]{hyperref}
\usepackage{xurl}


( \big( \Big( \bigg( \Bigg( or [ \big[ \Big[ \bigg[ \Bigg[ for parentheses and brackets

\big\{ \Big\{ \bigg\{ \Bigg\{ \dots \Bigg\rangle \bigg\rangle \Big\rangle \big\rangle for braces and cheverons

see http://en.wikipedia.org/wiki/Help:Displaying_a_formula#Continuation_and_cases

You can also define stretched values. A stretching value is a length preceded by plus or minus to specify to what extent tex is authorized to change the length. Example:

\setlength{\parskip}{10pt plus 5pt minus 3pt}

It means that tex will try to use a length of 10pt; if it is underfull, it will raise the length up to a maximum of 15pt; if it is overfull, it will lower the length up to a minimum of 7pt.

% From documentation in epslatex (by Keith Reckdahl):
%   \floatsep     - spacing between floats at top/bottom of page
%   \textfloatsep - spacing between text and the float at top/bottom of page
%   \intextsep    - spacing above & below the float in the middle of page

% The removed 20% extra spacing is added back, thus 1 / 0.8 = 1.25
%
\setlength{\floatsep}{1.25\@twolinespacing}
\setlength{\textfloatsep}{1.25\@twolinespacing plus 5pt}
\setlength{\intextsep}{1.25\@twolinespacing}

\setlength{\abovecaptionskip}{2mm}
\setlength{\belowcaptionskip}{2mm}

Common length macros are:

\baselineskip 
    The normal vertical distance between lines in a paragraph.
\baselinestretch 
    Multiplies \baselineskip.
\columnsep 
    The distance between columns.
\columnwidth 
    The width of the column.
\evensidemargin 
    The margin for 'even' pages (think of a printed booklet).
\linewidth 
    The width of a line in the local environment.
\oddsidemargin 
    The margin for 'odd' pages (think of a printed booklet).
\paperwidth 
    The width of the page.
\paperheight 
    The height of the page.
\parindent 
    The normal paragraph indentation.
\parskip 
    The extra vertical space between paragraphs.
\tabcolsep 
    The default separation between columns in a tabular environment.
\textheight 
    The height of text on the page.
\textwidth 
    The width of the text on the page.
\topmargin 
    The size of the top margin.
\unitlength 
    Units of length in picture environment. 

% minipage for beamer posters to split blocks into columns
                \begin{minipage}[b]{0.4\linewidth}
                \end{minipage}
                \hspace{0cm}
                \begin{minipage}[b]{0.5\linewidth}
                \end{minipage}

% align inside tabular cells
\begin{tabular}{l|l|}
      A & B \\
      & {$\!\begin{aligned} % http://tex.stackexchange.com/q/98482/16595 
               A &= B \\    % http://tex.stackexchange.com/q/78788/16595
               C &= D \end{aligned}$}
\end{tabular}

% ----- lists -----

% pack lists
\usepackage{enumitem} % to reduce a left margin in a list
\begin{itemize}[leftmargin=0.5cm]
  \setlength{\itemsep}{1pt}
  \setlength{\parskip}{0pt}
  \setlength{\parsep}{0pt}
  
  \item Aaaaa.....
  
\end{itemize}

% increase space between list items (useful in beamer presentations)
\begin{itemize}\setlength\itemsep{5mm}
 \item Item 1
 \item Item 2
\end{itemize}

