Tip: Now that you ticked "Enable Journal Managers to add journal announcements." in 4.4 Announcements, you can begin publish announcements, where?:

1) Go to User Home

2) Next select Journal Manager role

3) In Management Pages you can see the new option "Announcements", click this option

4) Now click in Create New Announcement

5) Write something and Save

6) That's it! You can see the new announcement in the top menu Announcements