First things first. Welcome to nUI
Okay, niceties outta the way. Yes, at present there are no GUI options for this addon. Everything that is possible to change is via slash commands /nui or the layout folder files.
To move the tooltip window type /nui movers and it will highlight the windows you can move. Find the tooltip one and move it to where you want it to be. Then type /nui movers to fix them back in place.