I don't know if it is by design or if I misconfigured something, but when I click on an email in the message list, the focus goes directly to the email preview window. But - how would I manually select multiple emails (e. g. for moving or deletion)? Normally in Windows I would select an item with the mouse and then press SHIFT+DOWN or SHIFT+END or SHIFT+PG_DWN etc. to select further contiguous items with the keyboard. I've not found a way to do this in Thunderbird. Thanks! Running: 78.5.0 (64-Bit) on Windows 10