Perhaps I am missing some quick pop-up help mechanism, but as a relative newcomer to QGIS (having cut my teeth on ArcGIS 10.1), I am struggling to find reference manuals (i.e. explanations of all parameters/operations) for many of the core commands/plugins. Most of the help seems to be in the form of tutorials, which though some are remarkably well written are not in a useful format when you want to know "what does field X in this dialogue box do?"
Firstly when trying to use the built in Vector -> Geoprocessing -> Buffer tool, what does the "segments to approximate" setting actually mean? Searching the official help pages I could only comes up with the following interesting but rather discursive article:
For the Points2one plugin, I've found some quite helpful information already on StackExchange for getting it to do basically what I want, but am surprised that I'm having to scrabble round for such information long after finding the plugin itself. Does anyone know if there is manual page for it? I couldn't find anything from its homepage: