LaTeX tip & tricks

I recently discovered the "trim" option of the includegraphics command :

\includegraphics[trim=Wcm Xcm Ycm Zcm]{image-file}
%left bottom right top

Will remove Wcm on the left, Xon the bottom side, Ycm on the right side, and Zcm on the top side. Be careful when trim AND angle are used at the same time !