Plugins ee-6.1.x GIT ID: c381f1d974dbaa6749415a3492ed83718a934209.
Plugins 6.1.x GIT ID: a956b1459289e480e80ea256a36c52ebd36c333e.
Plugins 6.2.x GIT ID: 871f378349a00f20cc727d061165812ce2c2ad7f.
When you click Mark as Read on an entry, a new section shows up that you can expand by clicking "+" to show all entries that have been read. In this new section, you can mark an announcement as unread and it will move back up to the active announcements section. You can also collapse this section by clicking the "-". When there are no more entries marked as read, the section will be hidden. Please see attached screen shot for the section marker.