The topic type is the visual indication for other users to know what is topic about at a glance. When creating a new topic, users can select the topic type that they are going to start. The administrator can define these topic types.
Click 
on the Forum Administration bar and click Topic Types from the drop-down menu to open the Topic Type Manager form.
The Topic Type Manager form lists all topic types and allows you to add new topic types, edit or delete the existing ones.
Add a topic type
1. Open the Topic Type form via one of two following ways:
The first way
Click Add Topic Type in the Topic Type Manager form.
The second way
Click 
next to the Type field in the Option tab of the
New Topic
or
Edit Topic
form.
(Note that only administrators can see .)
2. Enter the topic name in the Type field, then select an icon for this topic type.
3. Click Save to accept adding your new topic type. You will see the new topic type added.
To edit the topic type, click
.
To delete the topic type, click
.