When you display gridlines, you can move a shape and position it precisely by dragging the shape and letting it snap into place.
Red dashed lines are called smart guides that significantly appear so you align items vertically, horizontally, or both. Smart guides also appear between objects or near the edges of the slide to help you space out objects evenly. Press Shift to select multiple objects.
According to the context of this question, a non-placeholder container for the text that you can position anywhere on a slide is known as Gridline. A regular grid of dotted lines is displayed on a slide to help in the proper alignment of the text.
Therefore, when you display gridlines, you can move a shape and position it precisely by dragging the shape and letting it snap into place.
To learn more about Text alignment, refer to the link:
https://brainly.com/question/29743980
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