We bought this tool expressly for engraving custom Love Locks at our Loveland Visitors Center. While it does a great job at the engraving, the design tool in Creative Space is a little clunky. I created a template to use that includes a rectangle that is essentially the borders of the engravable space on the lock that we don't actually engrave, but it is way too easy to accidentally move this border when trying to manipulate the text and icons that we are engraving inside the box. 

For the life of me, I cannot figure out how to lock this rectangle in place so that it cannot be moved. Am I missing something, or is there another way to indicated a template or space that can be engraved in creative space that doesn't get engraved and stays in place?

I uploaded an example for reference. Thank you!!