Process design artifacts have been increasingly used to guide the modeling of business processes. To support users in designing and understanding process models, different process artifacts have been combined in several ways leading to the emergence of the so-called "hybrid process artifacts". While many hybrid artifacts have been proposed in the literature, little is known about how they can actually support users in practice. Objective: To address this gap, this work investigates the way users engage with hybrid process artifacts during comprehension tasks. In particular, we focus on a hybrid representation of DCR graphs (DCR-HR) combining a process model, textual annotations and an in-Work supported by the Innovation Fund Denmark project EcoKnow (7050-00034A); the fourth author additionally by the Danish Council for Independent Research project Hybrid Business Process Management Technologies (DFF-6111-00337).