Can I restrict goyo to an existing `window` region?

I work with high-resolution monitors and issuing `:Goyo` shall take over all the pixels that are originally painted by the current Vim process. As a feature request, may there be a special command to only enter **Goyo** mode in one of the established window-view?

This occurred me to today when editing a long document while needing to use `:split` to view other buffers for reference. While I can still issue `:split` after getting into the **Goyo** mode, there is no significant visual divider that separates the two buffers/windows apart: they look like a long continuous document :)

Please close this issue if it is against how Goyo has been designed for.