Manifestors are distinguished in Human Design by specific characteristics in their chart:
Defined Motor Center Connected to the Defined Throat: A Manifestor has a motor center (Solar Plexus, Root, or Ego/heart) directly connected to the Throat through a defined channel. This connection gives Manifestors their capacity to manifest, initiate, and speak things into reality.
Undefined Sacral Center: Unlike Generators and Manifesting Generators, Manifestors have an undefined Sacral center. This means they do not have consistent access to the sustainable life force energy of the Sacral, requiring them to manage their energy differently.
The attached image is actually my chart! As you can see- the motor "solar plexus" is defined & connected by the channel 35-36 to the defined throat, and the sacral center is not defined.
I made my free chart on MyHumanDesign.com.