Where is the Plugins folder documented?

[Richard Gaskin]

I find myself often needing to explain how to set up the user Plugins 
folder and why LC has two such folders.

This morning I figured it might make more sense to just refer folks to 
the appropriate section of the User Guide, but I could find no such 
explanation there.

Then I thought I'd try the Guides, which are hidden away in a stack 
named "Dictionary".  The only info there about Extensions is exclusively 
about LC Builder, and I couldn't find any mention of the Plugins folder 
at all.

Where is it documented?

-- 
  Richard Gaskin
  Fourth World Systems
  Software Design and Development for the Desktop, Mobile, and the Web
  ____________________________________________________________________
  Ambassador at FourthWorld.com                http://www.FourthWorld.com