To select an object, Ctrl+left click on the shape will do so To deselect an object, Ctrl+right click on the shape will do so Ctrl+C, Ctrl+V, and Ctrl+Z all work as expected. Creation of objects is ...
to achieve the rotation function, I look over the LittlevGL, found that can use the object “canvas“ to do it, because it have capbility to rotate, while all the object inside the canvas will rotate.