You can customise your folders by adding an image - for example, your company logo, or a personal photo.
Right-click on the folder select the change icon, then selects Change Image. Follow the instruction from there. You can also change the colour of the book by selecting a suitable colour from the colour bar. The system will also remember the colour that you previously chose. This is displayed under "your colour section".
Please also tick the "Apply this change to all subfolders" if you would like to apply this change to all other sub-folders