Virtual and Augmented Reality have become common tools in the architectural design process. This technology assists all participants in gaining planning certainty. To interact with the digital models, different input methods are used and adapted by the authors like keyboard, on screen menu, tangible interface, tablet PC and PDA. While every input method has certain advantages and disadvantages, currently tablet PC and PDA best cover the usersi general needs. A usability test shows that reviews with tablet PC are faster compared to other interfaces.