KNode Headers - Downloading More

Hi,

Brand new to this list and I do hope it is the right one for KNode ;)

If it is, I am using KNode and really find it works very well.

One of my grievances [or beefs ;) ] is that let's say I set the max headers to download at 500--and after I 1st subscribe to newsgroup "A", I find I really wanted/needed 5000 headers.  I see no way for me to download more headers (as one can do in PanReader and others); except by un-subscribing (losing all of the "watched threads, etc.); and re-subscribing with the new max headers to download setting....

Please don't reply with RTFM as I have RTFM and not found anything on that specific issue.

Any experts out there might now of a way for me to be able to download additional headers for a newsgroup already subscribed?

Thanks.