Announcements Block Plugin for OJS 3

Installation

Install the Plugin via Plugin Gallery (Settings->Website->Plugins->Plugin Gallery) or download the release matching your OJS/OMP/OPS Version and install via Settings->Website->Plugins->Upload A New Plugin.

Activate plugin:

Settings:

Activate block

Go to Settings->Website->Appearance and scroll down to Sidebar management. Activate the Announcements Block and drag it to the desired position.