Rectangle dialog box
Options
Width
Specifies the width of the rectangle.
Height
Specifies the height of the rectangle.
Arc Size X
Specifies the roundness of the rectangle corners in the X axis. The unit used is pixel or percentage (%).
Arc Size Y
Specifies the roundness of the rectangle corners in the Y axis. The unit used is pixel or percentage (%).
Position
Left
Sets the distance of the rectangle’s left edge from the left edge of the canvas.
Top
Sets the distance of the rectangle’s top edge from the top edge of the canvas.