You can move AP elements in the Design view in much the same way that you move objects in most basic graphics applications.
If the Prevent Overlaps option is on, you will not be able to move a AP element so that it overlaps another AP element.
To move by dragging, drag the selection handle of the last selected AP element (highlighted in black).
To move one pixel at a time, use the arrow keys.
Hold down the Shift key while pressing an arrow key to move the AP element by the current grid-snapping increment.