Communication - Demonstrating Credibility

At work, people don’t attribute any credibility to you, though you’re probably as competent as anyone else. You need to increase the nonverbal credibility cues you give off. What nonverbal cues can you use to communicate your competence and ability? How might you begin to integrate these into your everyday interactions?

Other information

Substantial answer please. This textbook is  Joseph, A., D. interpersonal messages Hunter College of the City University of New York, 4th Edition.

See sections attached I copied from the text. The question is on page 143 (Journal Interpersonal Choice Point