A domain-specific language (DSL) can have multiple syntaxes, that can be graphical or textual. When modelling the behaviour, complex expressions, and fine details of a domain, often it does not make sense to use a graphical syntax, as this can result in large, crowded diagrams, therefore in such cases, a textual syntax is often more appropriate. As such, the best of both worlds can be delivered by a DSL that has hybrid (part-graphical and part-textual) syntaxes. In this work, we address open challenges and apply model-driven engineering techniques to streamline the development of hybrid graphical-textual model editors for DSLs, by using as little hand-written code as possible.