The International Classification of Functioning, Disability and Health (ICF) is a taxonomy that classifies health states and health conditions. It is a complex and detailed taxonomy, with 1,424 categories, covering body structures and functions, activities and participation, and environmental factors. The complexity and detail, however, can serve as a barrier in its everyday application. A number of strategies have been developed to facilitate use of the ICF in clinical and research practice, including the development of ‘core sets’. In this article, we present another method which will assist both the newcomer and those more familiar with the ICF. Along with a description of the ICF structure and contents, the article presents a graphical representation of ‘ICF trees’ as a vehicle to more readily grasp the detail of the ICF structure and contents and facilitate its use in the area of acquired brain impairment.