You might be wondering what if you change something about the model.
It can be a small thing like a small change to an object class or a bigger thing like merging or splitting diagrams or even major structural changes.
ControlDraw is designed to support making such changes quickly.
Backups are easily made so that you can easily restore a previous version if the changes do not achieve what you want
Things you can do to make changes
Draw a p&id. Take selected parts, copy, make a new page, paste as clones. Then make those clones the master.