Marco Russo and Alberto Ferrari build on a foundation:
In a previous article, we introduced VISUAL SHAPE, the table modifier that adds a hierarchical structure to a table, which is needed to implement visual calculations. In this article, we introduce the concept of visual context, the virtual table lattice, and the two main operators to navigate in the visual context: EXPAND and COLLAPSE.
Click through to learn more about these operators and how they fit into the rubric of visual calculations.