Add an interactive object and open the Interactive Object window. Select “Drag & Drop” for Mouse left button event.

Click the OK button to close this window. Locate the mouse cursor on the middle handle and you will notice that the mouse cursor will change to a “+” shape.

Hold down the mouse button and drag the rectangle to a new “Drop” location. You will see an arrow facing the new rectangle.

The first rectangle is where you start the drag and the second rectangle is to where you drop. As long as the mouse cursor is within the rectangle, it is regarded as a success.
If you want to delete the interactive object, you can delete it the same way you do with other objects.