I think the best way to save the old buttons is to make a temp page, then copy/paste them into that page for safe keeping (it'll retain their current position if you make the temp page the same size as the original one). Then you can delete them from your working page with confidence. Don't just make a clone of the whole page, there's a bug in VSD that screws up the button code on the new ones when you do that. Clone the page, then delete the cloned buttons and manually copy/paste the originals into the new temp page.
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