The generation of ideas and the development of architectural design are affected by the actions of graphic software computer operators. This study is focused on the ZOOM instruction of CAD softwares as one of these operators, in an analogy to the concept of Architectural Scale. The terms ZOOM IN / ZOOM OUT were first used by us in 1998 in a methodology proposal developed in a MSc thesis – The Design Process in the Computer Environment – An Analogy between Computer and Design Operators, and subsequently implemented in a virtual design workshop, with the aim to use computer tools in the development of architectural knowledge.