Question

The cornor handles will resize the object proportionally.

Answer 1

resize layer proportionally using vertical handles

Answer 2

The fixed point resize too resizes rectangles, rounded rectangles, polygons, circles and objects using a fixed point on the drawing as the point of reference.

It is best used to scale an object relative to a particular location in the drawing.

Press and hold the Shift key while dragging a corner handle in the canvas.