Thread and Newsgroup Icons

Collapsed Thread Icons
   The red symbol with a plus sign indicates there are unread articles in the thread.
   The black plus symbol indicates there are more articles in the thread, but no unread articles.
   The minus symbol indicates this is the only article in the thread (read or unread). It is also the default icon when the thread is expanded.

Newsgroup Icons
  "Headers only" (default) storage mode
  Article bodies are stored locally
      Article body storage is set for individual newsgroups in Newsgroup - Properties - General - "Retrieve and store article bodies"
  or   A red slash indicates that the headers will not be retrieved automatically for this group when you use the server command "Retrieve All Headers"   This override is set for individual newsgroups in Newsgroup - Properties - General - "Do not automatically retrieve headers for this group"
or   A red border indicates that this a "Sampled" newsgroup.