You can change the details of any journal group. Click on Journals link available in the left sidebar. The sub-links appear as below.
Click on Journal Groups link. The Journal Groups page appears, and you can see the list of all journal groups.
Locate the target group that you want to edit.
In Action column, click on Edit button. The journal group details are editable now.
Change the group name, or upload the image, as required.
In Action column, click on Save button to save the changes.