thunderbird - a few questions for use with newsgroups

Hi mozilla fans, I'm using thunderbird also for news. Could you please
advice me how do I:

- redownload all message headers? (i found i can unsubscribe and
subscribe again, but i hope there's more clever way)
- delete expired messages from the group? (i know i can simply select
old messages and do it manually, but maybe mozilla can do it itself)
- sort subscribed newsgroups? (alphabeticaly or manually move those i
visit most to top and those i visit only occasionally to bottom of list)
- limit number of maximum connections to news server?

Thank you,
Y.

 

Deleting the msf file associated with the group will cause it redownload
headers.

No, it cannot.

Edit the newsgroup rc file. There is nothing in the ui to allow this,
but you can open the rc file in a text editor and rearrange the groups.

Lee

 

Thank you for tips, seem to work fine Only one question remains
unanswered
- How do I limit number of maximum connections to news server?

Y.