Sketchable Interaction (SI) describes a concept and environment where end-users create regions by drawing on a canvas. These regions apply effects to each other on collision. Attributes of regions, e.g. position, can be linked to each other so that they change together once modified, e.g. moved on the canvas. Within Sketchable Interaction, all entities - mouse pointer, desktop icons, or windows - are implemented as interactive regions. End-users customize this environment by drawing new regions that apply certain actions e.g. tagging files, deleting other regions or automating processes.