Comment 8 for bug 446787

> It only flips around the selection centre for a start, not the whole page
A workaround is to place the center of the object or selection at the center of the page. That way you get a flip relative to the page.

> and it means having to select all objects to flip them, and so doesn't work when one or more layers is locked and you try to select them.
This adds the problem that such a tool would be selecting and manipulating objects that are in locked layers, and flipping them based on the page's center instead of object's center. I'm not saying it's impossible to implement but it seems a bit risky to have such an option (especially the locked layers thing). Also, I fail to see why this approach is so important. I can understand why is important to flip the canvas but not why it's important to do this permanently. What's your use case? wouldn't a visual flip (not a real transformation) would suffice for drawing?

Regards.