tricks in latex

1) use double line spacing:

\renewcommand{\baselinestretch}{1.66}\normalsize

2) organize the figures in column:
use the tablular for organizing the figures.s
\begin{figure}
\begin{center}
\begin{tabular}{cc}
\includegraphics[width=6cm,height=14cm]{Figure1.png}
\includegraphics[width=6cm,height=14cm]{Figure2.png}
\end{tabular}
\end{center}
\caption{Two examples of DEMETER and MHR observations.}
\end{figure}

3) adding more space between the columns of text:
#define that the report is presented in two columns
\documentclass[11pt,landscape,twocolumn]{report}
#define the column distance
\addtolength{\columnsep}{5mm}