In a blocksworld diagram, the visualization uses geometric shapes to represent different objects and their statuses. Each object, such as a block or a table, is represented by a specific shape, and the position of these shapes reflects their physical arrangement in the blocksworld scenario.

- **Shapes**: Rectangles are used to represent blocks, while a large rectangle at the bottom represents the table. The hand is visualized as an oval or circle above the blocks, indicating its position relative to the blocks.

- **Colors**: Colors are used to convey the status of the blocks. For instance:
  - **Green** indicates a block is "clear," meaning there are no other blocks on top of it.
  - **Red** indicates a block is "supporting" another block, meaning it has another block on top of it.
  - The hand, when empty, might be colored blue to distinguish it from the blocks.

- **Sizes**: All blocks are typically of uniform size to indicate they are of the same type. The table is larger to show it can support multiple blocks. The hand is smaller to represent its role in manipulating the blocks.

- **Text Labels**: Each block and the hand are labeled with text identifiers (e.g., 'a', 'b', 'hand') to identify them uniquely. The status is also labeled inside the block to provide additional information.

- **Legend**: A legend is included to map colors to statuses, ensuring clarity for anyone interpreting the diagram. The legend is placed outside the main diagram area to avoid overlapping with the objects.

- **Positioning**: The relative positioning of blocks reflects their stacking relationships. Blocks on the table are positioned at the bottom, while blocks on top of others are drawn above them. The hand is positioned above all blocks to indicate it is not currently holding any block.

This visual encoding allows anyone unfamiliar with the blocksworld domain to understand the spatial and status relationships between objects in the diagram.