I don't know what you mean by that. Can you say more?
Is the issue that you're using Word in full-screen mode and it's switching you back to the desktop space when you use the plugin? Because that's unavoidable — the citation dialog is a separate Zotero window, so it has no way of appearing on top of a Word window in full-screen mode.
Actually it is not like that, I have experienced this many times from my friend's computer, we do not open a new window as you mentioned, a Zotero search button appears directly on the worth page.
Is the issue that you're using Word in full-screen mode and it's switching you back to the desktop space when you use the plugin? Because that's unavoidable — the citation dialog is a separate Zotero window, so it has no way of appearing on top of a Word window in full-screen mode.
You can provide more screenshots to show what you're referring to, but if you're using full-screen mode, what I said applies.