[Docs] Update

docs/parts/reference/extras.tex

@@ -1,10 +1,9 @@
-\newpage
-\section{BibTeX}
+\subsection{BibTeX}
 Use \verb|\setupBiber|\{\textit{/path/to/your/bib/sources.bib file}\} in the preamble to prepare, then use \verb|\printbib| to print your bibliography.
 
 To add more sources, simply use bibter's built-in macro \verb|\addbibresource|\textit{\{filepath\}}, which will load your \texttt{.bib} file.
 You need to use that inside the preamble as well.
 
 
-\section{Glossary}
+\subsection{Glossary}
 Use \verb|\setupGlossary| in the preamble to prepare, then use the normal glossary commands to add entries to the glossary. When you want to print it, use \verb|\printGlossary|.

docs/parts/reference/style/spacing.tex

@@ -20,7 +20,9 @@ See \hlhref{https://www.overleaf.com/learn/latex/\%5Cabovedisplayskip_and_relate
 and \hlhref{https://latex-tutorial.com/latex-space/}{here for a good guide on spacing}.
 
 To control paragraph spacing, see \hlhref{https://mirror.ox.ac.uk/sites/ctan.org/macros/latex/contrib/parskip/parskip.pdf}{here}\ 
-and \hlhref{https://www.overleaf.com/learn/latex/Articles/How_to_change_paragraph_spacing_in_LaTeX}{here}
+and \hlhref{https://www.overleaf.com/learn/latex/Articles/How_to_change_paragraph_spacing_in_LaTeX}{here}.
+Do make sure to put the \texttt{usepackage} \textit{before} loading the helpers.
+Alternatively, you can use \verb|\PassOptionsToPackage{options}{package}|
 
 To make use of \TeX's automatic wrapping of short alignment environments, use the \texttt{aligned}
 (or, if no alignment is needed, use the normal \verb|\[ <math> \]|) instead of the \texttt{align} environment for short equations.