Thanks for your reply Margaret.

Unfortunately your suggestion to set the tab positions via the header style
same the same problem as if I had changed the tabs using the mouse.

Thanks for the links, I didn't know that the master document feature was
quite so dodgy.

When I've completed the subdocuments I'll try and create a new master
document and see if that solves the problem.

Any other sugesstions will be gratefully recieved.

Thanks once again,

Dave