  The dominant programming languages support only linear text to express ideas.
Visual languages offer graphical representations for entire programs, when
viewed with special tools. Hybrid languages, with support from existing tools,
allow developers to express their ideas with a mix of textual and graphical
syntax tailored to an application domain. This mix puts both kinds of syntax on
equal footing and, importantly, the enriched language does not disrupt a
programmer's typical workflow. This paper presents a recipe for equipping
existing textual programming languages as well as accompanying IDEs with a
mechanism for creating and using graphical interactive syntax. It also presents
the first hybrid language and IDE created using the recipe.
