How can I add some annotations to a screenshot so that the font can fit the (La)TeX document?

Question

I want to add a screenshot with some text annotations in it, so that I can incorporate it into a (La)TeX document where the font used in the annotations match the document font.

What's the recommended software to create this kind of picture?

EDIT

This is a small example. I hope the annotations' ("Sidebar", "Title", and "Infobox") font can fit the document's. And (if possible) the annotations can come with the picture.

Answer 1

Getting the web image saved will vary with your OS. What I did on Windows was get the webpage on the screen, hit Shft-Ctl-PrtScn. Then I opened up MSPaint and hit Ctl-V to paste it. Then I cropped it and saved it as LaTeXwiki.jpg.

Once I had the image, that's where LaTeX comes in. I used \stackinset to overlay my comments upon the image. In this case, I used three nested \stackinsets laid upon the imported graphic. I used the left-top of the image as the origin (the l and t arguments of \stackinset); however, each inset could, if desired, specify its own origin (l,c,r for horizontal, t,c,b for vertical).

\documentclass{article}
\usepackage{stackengine,xcolor,graphicx}
\begin{document}
\noindent\textcolor{red}{\sffamily\scriptsize
\stackinset{l}{3.4in}{t}{1.4in}{\stackon{\framebox(95,80){}}{Infobox}}{
\stackinset{l}{.2in}{t}{1.04in}{\stackon{\framebox(45,200){}}{Sidebar}}{
\stackinset{l}{.98in}{t}{.8in}{\framebox(30,10){} \raisebox{2pt}{Title}}{
  \includegraphics[width=\textwidth]{LaTeXwiki}
}}}
}
\end{document}