What makes a good computational drawing? What over-arching principles guide the creation of computational drawing projects? This chapter begins with an exercise that prompts the re-coding of a common digital tool with the aim of capitalizing on willful misuse as a creative enterprise. The exercise further prompts, "Make a work of art with your code by continuing to change and evolve it. Embrace the surprising results that may emerge as you treat your code not as tool to perform a single function but a medium to explore new possibilities. What may have been considered a flaw may be prized as a generator of a new kind of line, form, shape, or space. Furthermore, explore the productive misuse to the code. Can the code be modified to expand the set of possible inputs beyond what would’ve made sense within the narrower scope of possibilities when interpreted as a mere tool?" As the chapter progresses, the computational drawing is further considered in multiple positions relative to the human author. We often assume that a computational drawing is the result of a highly intelligent or optimized process, but a "dumb underlay" may be just as valuable in a creative practice.