I have a project configured for “Any CPU”. When I go to solution properties, under Configuration Manager -> Active Solution Platform I can see only:
Any CPU
<New…>
<Edit…>
I want to change it to x86, so I select and am presented with another dialog that asks me where I want to copy the settings from.
What does this actually mean? Which settings does it copy?
It's talking about project settings (build directories, reference, etc), but since you have only one active configuration just choose to copy settings from it ("Any CPU").