Modifying the position of a stamp

The position of a stamp can be modified in the same way as the position of all other objects. However, there are some issues:

Stamp Album Studio does not allow to position a stamp on top of another stamp. The stamp that is moved will be moved back to its original position;
When a stamp is being moved the labels will be moved with it. However, when a label is moved the position of the stamp is not adjusted.