How to Insert and Edit Shapes in Google Slides
The shape is placed.
Once the shape is inserted, it can be resized and moved around.
You can also change the fill and border color of a shape, as well as the width and style of the shape border.
If you'd rather use a different shape while keeping the same position, size, and formatting, you can change the shape.
The shape is updated, but the formatting and size remain the same.