The sheet numbering in VeSys Design is currently a manual process and it can be time consuming if a new sheet is added in the middle of say 60 sheets because every sheet after the new one has to be renumbered.
Unfortunately we can't just add the new sheets at the end because they are stacked vertically in Alphabetical Order, i.e. ABS is at the top followed by Air Conditioning, Bus Systems, Cruise Control, etc.
It would probably be sensible for VeSys to be configurable on how it renumbers the sheets i.e. left to right, top to bottom.