Final answer:
To center-align and align text on the top of a placeholder in PowerPoint, go to the Format tab. In the Alignment section, choose the options to center-align and align to the top.
Step-by-step explanation:
To center-align and align the text on the top of a placeholder in PowerPoint, you need to go to the Format tab. In the Format tab, locate the Alignment section. Under the Alignment section, you will find options to align the text horizontally and vertically. To center-align the text, click on the 'Center' option, and to align it to the top of the placeholder, click on the 'Top' option.