I'm wondering if it is possible to change where on an object its X-Y co-ordinates are based on.

For example if I am trying to position a circle on a page and instead of placing it based on X-Y co-ordinates for the lower-left corner of the object I would rather place it based on the centre of the object.

Basically what I'm looking for is something similar to the rotation tools 3x3 grid that lets you quickly choose a rotation point for an object but instead would allow you to set the point that the objects x-y co-ordinates are based on.

Just incase it matters, I'm running Xtreme Pro 3.2.3

Thanks