This would help so much.
You can try "Find" option and selecting the kind of object, then apply the change with the menu. Maybe on latests versions on Corel Draw you can use "Find & Replace" also for multiple pages in one time. It can work faster. There can be also other solutions despiting macros.
Funny thing about the Find docker is that it seems to be bugged. It only worked one time and I had to reset and add a new query and run it again.