I have used Thunderbird for many years. In the past, when I have searched for particular messages, my most common strategy has been to look for a keyword in the message body. Now Edit/Find/Search Messages no longer offers the option of searching the Body of messages. I would paste in a screenshot but I can't see how to do so. Trust me, the pull-down menu offers: Subject, From, Date, Priority, Status, To, CC, and many other useful choices. But not Body. I have tried checking for updates, restarting Thunderbird, and restarting my computer, to no avail. I am running version 11.0.1 of Thunderbird on my MacBook Pro, which is running version 10.1.2. Thunderbird for Mac hasn't been updated for a long time, which makes me wonder whether this problem is an unexpected result of recent Mac OS updates. Suggestions? If I am no longer able to search the body of messages on Thunderbird, I will have to switch to a different email program. That would be time-consuming and SAD. Thanks for your help.