I use Mozilla Thunderbird almost every day, but one of my biggest peeves about it is that anytime I reply to a message, the cursor for my response always starts at the bottom of the message!
Thankfully, there’s a quick and easy way to fix it so that anytime you hit reply your cursor will be on top where it belongs!
In Thunderbird, click Tools>Account Settings, and in the resulting window, make sure Composition & Addressing is selected. Under the Composition header, make sure Automatically quote the original message when replying has a check mark next to it and in the drop-down box select start my reply above the quote.
When you’re done, hit OK.
Voila! Now whenever you respond to a message, you’ll start off typing at the top, instead of all the way down at the bottom of the quoted text!