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<html><head><meta name="viewport" content="width=device-width, initial-scale=1"><style>img { display: block; margin-left: auto; margin-right: auto;}</style></head><body><h2>Center an Image</h2><p>To center an image, set left and right margin to auto, and make it into a block element.</p><img src="img_paris.jpg" alt="Paris" style="width:50%;"></body></html>