Some of the benefits of using callouts in 3D are:

• Callouts make drawings easier to understand and interpret.
• The effectiveness of project communication is increased, leading to better informed decisions.
• Project quality is improved by the increase in speed to insight. This is beneficial through all phases of project: design, review, construction, operation.
• Callouts make 3D design models more reliable, effective and easy to use for construction, operation and so on.