Ae's new composition draws a rectangle. Why is the center point not in the center of the rectangle, but in the center of the whole canvas?
This is the default setting. After creating a new anchor position, you can modify the anchor position. Select pan backward (anchor tool) in the upper left corner, press the shortcut key Y, then select the anchor point, and hold down the left key of ctrl to move the anchor point, so that the anchor point can be quickly attracted to the center or control point of the edge of the drawn shape layer.