Vertical spacing in list of figures

Question

I would like to arrange the vertical space between the figures as shown in the

I do not know what the presence of this type of space is due.

Answer 1

You don't give an MWE so I can only guess that you are using a class that does not provide \chapter. For instance the book, report, memoir, ... classes provide a \chapter command which inserts a 10pt vertical space into the LoF and LoT. Try this

\newcommand*{\insertloftspace}{%
  \addtocontents{lof}{\protect\addvspace{10pt}}%
  \addtocontents{lot}{\protect\addvspace{10pt}}}

which will insert 10pt vertical space into the LoF and LoT. Assuming that you are using \section then calling this after each \section will insert the spaces you are after.

% preamble
\begin{document}
\tableofcontents
\listoffigures
\listoftables
\section{First} \insertloftspace
% text, figures and tables
\section{Second} \insertloftspace
% text, figures and tables
% and so on
\end{document}