This window has 2 parts: the title bar and the discussion topic table. 

• The title bar tells you where you are in AceProject. At the end of the title bar you will find a link to this contextual help. 
• The Discussion Topic table displays the topic's title and description. Simply type in the information, then click on "Update" or "Save" to apply it. Click on "Delete" to remove the topic from the list. Click on "Back to Topics" to return to the project's discussion topics.

What are discussion topics?
Discussion topics allow you and your project members to hold and record conversations about a project. Users can participate whenever they want. The discussion forum organizes conversations by topic and by date, so users can follow a "thread" of conversation before they join in, or they can initiate a new thread of discussion.

Who can create a discussion topic?
Any user assigned to the project can create a new discussion topic.

Who can contribute to a discussion topic? Who can post messages to a topic?
Any user who is assigned to the project can post messages to a discussion topic. Once a message is added to the topic, it cannot be modified. Administrators and project managers can delete a reply in case it contains inappropriate content.

Who can modify/delete a discussion topic?
A discussion topic can be deleted or modified by its creator and the project managers. All other users  are not allowed to delete it or make changes to its title and description. When a discussion topic is deleted, all its messages are also deleted.