A device can implement a stage view depicting a visual element for each of a plurality of components of an application under development. The device implements a code overlay showing whether code can be applied to the components and, for components to which code can be applied, a code status indicator. The status indicator may relate to procedural code or to a data member, such as an object or other variable. Different indicators can be used to show that code can be applied, code is applied correctly, incomplete code is applied, or code is applied but contains an error. Different colors or other visual effects can be used to indicate status. The indicators may be selectable to provide a code viewing or editing interface. A status indicator for code associated with a component can be positioned near the visual representation of the component, but may be repositionable.