I have a ton of mailboxes in my various Eudora setups. Every month or so I compact all the mailboxes. I do this by option-clicking on the mailbox info box in the lower left corner of a mailbox. What I remember happening is each box getting instantly compacted. Now it seems that they will be done at some point in the future. I don’t see anything in the preferences, and Google didn’t turn up anything useful (Gasp!). And the useless Eudora/Qualcomm web site didn’t turn up anything about this either. Any ideas?
In more recent versions of Mac Eudora, click or cmd+click on the mailbox info box to instantly compact a mailbox.
Option+click schedules all of your mailboxes to be compacted during idle time.