How do I set or access the value of an instance variable for an object in another layout?

I set a "persist behavior" to an object so that it will save its data when my player switches to a different layout. Would it be possible to access that persist object from another layout?

You can make it global, so it doesn't get destroyed when changing layouts (hide it somewhere or make it invisible).

Or you can store the data in a global object like an array or dictionary, or use global variables.