I am using Microsoft Visio 2003 to define static classes with
operations/methods and a sequence diagrams referring to these classes. The
sequence diagram is almost done, but i realized that i missed one operation
in middle of the diagram. When i try to move rest of the sequences down by
selecting it as a block, all the operations in the block loose link with
static diagrams. ( Methods which were referred to static classes as fun(),
became fun, which means that now they no longer refer to static diagrams and
any future changes would not be reflected in dynamic sequence diagrams
automatically.)

The sequence diagrams have grown to A3 size paper and i have many of such
diagrams which needs correction. Manually moving the operations one by one
would involve lots of effort. Could someone kindly suggest a way to overcome
this problem?