From the administration console, accessing with the administrator role you can add or change the logo.
To assign a new logo you must:
1. Go to the Settings option in the main menu, Settings tab.
2. Click on the Edit icon located at the bottom left of the Logo field and select the file containing the image. Note: preferably the logo size should be 400x200 pixels with an internal image margin of 10 pixels.
3. Once the previous step has been completed, check that the new logo has been added to the Logo field.
4. If a logo already exists, to assign a new one, you will first need to delete the existing logo by clicking on the Delete icon.