I am running MacTex (on my Mac, obviously) and I remember I used to use a command a lot in the Terminal to simply open up the manual for a specified package. Something like this, for example:
manual pgfplots
That isn't the command, though. I can't remember what it is. Does anyone know?
texdoc pgfplots. – Werner Feb 18 '16 at 05:00texdoctk, which give you a nice graphical interface for browsing and searching documentation. – Thérèse Feb 18 '16 at 05:05texdoccommand is not available, there's always http://texdoc.net/ – jon Feb 18 '16 at 06:42texdoc <name of package>on the command line also works in MikTeX. – Sveinung Feb 18 '16 at 10:16