If I am forced to use word documents, then Onlyoffice.

Otherwise Latex for text and presentation (beamer).
For tables I use the terminal program sc-im, which also works with excel files.

It’s very difficult to learn, you just need to adapt to the Latex style of writing and Latex takes care of (almost) all the formatting.

That does the trick, thanks!

peek.nvim should do what you like. I found it however not so straightforward to get it running.

Please share if you find something better which doesn’t need a browser.

I managed to sign up just a few min ago. Are you trying to sign up via the beehaw.org website?