• Calmly confident
• Chapter's heading typed in, set equidistant from the margins (8)
• Emotionally secure
• Eye-pleasing, as a wall hanging
• Focused on
• In the middle
• Moved to the middle
• Placed in the middle
• Poised
• Snapped as a football
• Well-balanced
centered affine space — <geom.> пространство центроаффинное
property of being centered — центрированность