Is there a way, inside the editor, to flatten the structure of an ePub? I know one can do an epub-to-epub conversion and check the box to flatten in the conversion parameters, but that introduces some problems of its own in omnibus editions.
I've tried checking all of the menus, all the right-clicks that make any sense to me, and all of the select-by-icon options. Am I missing something, or is this something that is held away from the editor (or, for that matter, the Polish function in the main, non-editor window) for Reasons?
