Which feature would you use to maintain the aspect ratio of an image while resizing in After Effects?

To maintain the aspect ratio of an image while resizing in After Effects, the Constrain Proportions feature is utilized. This feature ensures that the width and height of the image scale proportionally, preventing any distortion. When this option is enabled, resizing the image in either direction will automatically adjust the other dimension to keep the original aspect ratio intact.

Using Transform Properties allows for adjustments to various attributes of a layer, including scale, but doesn't specifically address the maintenance of aspect ratio unless the Constrain Proportions option is activated. The Scale Tool is a functional aspect of transforming a layer, but again, it does not inherently maintain the aspect ratio unless paired with the Constrain Proportions setting. Lastly, Position Adjustments pertain to the placement of a layer on the stage and do not influence the resizing aspect or the aspect ratio of an image, making them irrelevant in this context.