In the diagram, each object is represented by a specific shape and color to convey its identity, status, and role within the "barman" domain. The visual elements are standardized for clarity and consistency across different instances of the domain:

1. **Shapes**:
   - **Rectangle**: Used for objects like shots, dispensers, and hands. Rectangles are chosen for their simplicity and ability to accommodate text labels and statuses clearly.
   - **Circle**: Used for shakers to distinguish them from other container types like shots. The circular shape helps indicate the round nature of shakers.

2. **Sizes**:
   - **Small**: Used for shots and hands to indicate their smaller, more portable nature compared to other objects.
   - **Medium**: Used for dispensers and shakers, reflecting their larger size relative to shots and hands, and their central role in the cocktail-making process.

3. **Colors**:
   - **Red**: Represents ingredient1. This color is used for both the ingredient and its corresponding dispenser to maintain consistency and ease of identification.
   - **Blue**: Represents ingredient2. Similarly, blue is used for both the ingredient and its corresponding dispenser.
   - **White/Light Gray**: Used for clean and empty objects (shots, shakers). This neutral color signifies a ready-to-use status.

4. **Text and Status**:
   - Each object has a text label indicating its identifier (e.g., "shot_1", "shaker_1") and a short status (e.g., "clean", "empty") inside its shape. This ensures clarity and immediate understanding of each object's current state.
   - Text is placed centrally within the shapes to optimize readability and prevent overlap.

5. **Legend**:
   - A legend is included to map colors to ingredients and statuses. It serves as a reference to understand the color coding used in the diagram.

6. **Positioning**:
   - Objects are positioned relative to each other to reflect their relationships and interactions in the domain. For example, dispensers are placed above shots to indicate that they fill the shots with ingredients.

By adhering to these visual conventions, the diagram effectively communicates the initial setup of the "barman" domain, making it accessible and understandable even to those unfamiliar with the specific instance.