graphics - \includegraphics{<pdf image>} is dropping items (comments) from the <pdf image> file. Can pdfTeX support inclusion of PDF 1.6? - TeX - LaTeX Stack Exchange
graphics - Why does my Image not load? - TeX - LaTeX Stack Exchange
graphics - Why does the image not appear? - TeX - LaTeX Stack Exchange
How To Change Figure Size in LaTeX
Combining sub-figures to a single figure for submission to journal – texblog