To move a single object simply click on it and drag the mouse. If the object is filled you may click inside the object. If the object is not filled you must click on the edge of the object.
Note: If Preview is turned off objects are not filled. In this case you cannot move an object by clicking inside it. Click on the edge of the object to move it.
To move multiple objects together, first, select the objects you would like to move. Click on any one of the selected objects. Without releasing the button, drag the mouse until the objects have been moved to the desired position; then release the button.