negative number mean ??

Hi,

What does the negative numbers below mean ?

<Child type="VScroll" skin="VScroll" offset = "-10 3 16 3" align = "ALIGN_RIGHT ALIGN_VSTRETCH" name = "VScroll">
</Child>

<Child type="Widget" skin="DefaultClient" offset = "3 3 -13 3" align = "ALIGN_STRETCH" name = "Client">
</Child>


I have seen something as below in Ogre wiki, but no help

<Child type="any_widget_type" skin="any_skin" offset = "left top width height (offset in widget in pixels)" align = "child_skin_alignment [another_alignment]" name = "element_name">
</Child>

i try to understand it as above format, but have no ponit...

thanks


[... lots of widgets here ]
</MyGUI>

Surely it just means the widget has a negative offset (e.g. when you move widgets partially off the left or top of the screen).