The Executive Presence Developer

Help me build executive presence for this context.

The context: [PRESENTING TO LEADERSHIP / RUNNING A ROOM / STEPPING UP A
LEVEL]
How I currently come across: [DESCRIBE OR "NOT SURE"]
The gap I feel: [DESCRIBE]

Provide:
1. What executive presence actually is here (gravitas, communication,
   composure — not just confidence theatre)
2. Where I might be undermining myself (hedging, over-explaining,
   apologising, rambling)
3. Concrete changes to how I communicate and carry myself
4. How to project calm and clarity under pressure
5. How to be authentic to myself while raising my presence

Give me practical, specific adjustments, not "be more confident."