Autocomplete - larger and separate window?

Something that I think could speed up my work a little does not (I think) exist in LibreOffice, or any word processor.

When I am summarizing something on screen 2, and typing to my word processing document on screen 1 (mostly looking at screen 2), I rarely see the autocomplete word pop up before I’m finished typing it. However, if the autocomplete pop up word were larger - or, better, large and in a window on my second screen, I’d probably press return to use it a lot more often…Would this be possible with libreoffice writer?

This isn’t the place to make an enhancement request, see How to Report Bugs in LibreOffice - The Document Foundation Wiki . Be aware that you might not get much traction for your suggestion.
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You could see if this app (for Windows) which I came across co-incidentally today does what you want, Dicom Portable | PortableApps.com