Consultants can add designs for a building by drawing over which element?

The correct choice is to draw over the base plan in a separate layer, as this method allows for a clear and organized way to present modifications and additions to an existing design. By utilizing a separate layer, consultants can overlay their designs without altering the original base plan. This promotes clarity, enabling all stakeholders to see how the new ideas fit within the established framework of the building.

Additionally, working in layers is a standard practice in architectural design software, facilitating adjustments, collaboration, and ensuring that changes can be easily managed and visualized. It offers flexibility, as the base plan remains intact while providing the ability to modify or delete the consultant’s drawings if necessary.

The architectural manual, while a valuable resource for guidelines and standards, does not serve as a canvas for drawing designs. Existing sketches might offer inspiration or reference; however, they do not provide a structured environment for creating new designs effectively. Lastly, the color palette is focused on color selection and aesthetics rather than serving as a foundational element for architectural design.