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This paper deals with multimodal interaction, in particular the use of drawings in process modelling. The analyses presented are based on a case study: in a company, industrial process modelers question employees about workflows, then develop a preliminary process model of the production process and afterwards a computer-generated final process model. In these situations, the participants combine complex resources such as speaking, writing, and drawing. The records that arise contain written and drawn parts (graphic-symbolic elements). When and how do process modelers visualize? What are the functions of records? What role do recordings play in the multimodal interplay of communicative resources?