[Trisquel-users] Re : PDF proof read and printing annotations

[lcerf]

I use a \newcommand to write comment in another color (one color per  
contributor).  There are PhD thesis templates with commands to write in small  
letters in the margin.   
https://www.ctan.org/tex-archive/macros/latex/contrib/classicthesis/ in  
particular.  I actually used those margins to summarize the text of my  
thesis:  
http://dcc.ufmg.br/~lcerf/publications/PhD%20thesis%20(Lo%C3%AFc%20Cerf).pdf

That only answers point a.  Version control systems (such as 'git') are  
obvious answers to points b and c but they are far to heavy to just indicate  
that a coma should be added...