Mark All Messages Read Quickly in Mozilla Thunderbird
To mark all messages read in a Mozilla Thunderbird folder quickly: This trick can be handy when you have many messages in a folder, and you haven’t had time to read them, but you don’t want to delete them or archive them to a different folder. By marking all of them as read, you will be able to sort and prioritize the incoming messages you haven’t read.
Mark as Read by Date in Mozilla Thunderbird
You can also select a date range of messages to mark as read.
Mark Thread as Read in Mozilla Thunderbird
You can also quickly mark a message thread as read.
Sort Messages Read/Unread in Mozilla Thunderbird
When you open a message to read it in Mozilla Thunderbird, the message subject, date, and other data change from bold to regular font. Also, the green ball in the Sort by Read column changes to a gray dot. You can sort your messages in a folder by clicking the eyeglass icon at the top of the Sort by Read column. Clicking the first time places the unread messages at the bottom of the list, with the newest at the bottom. Click again, and the unread messages go to the top of the list, with the oldest at the top.
Restoring Messages to Unread
If you want to return messages to unread, select the gray ball next to the message in the list to change it to green (meaning it’s unread). To change a range of messages to unread, highlight the range and then right-click, select Mark and As Unread. You can also use the top Message menu, choose Mark > As Unread.
