We're talking about the same spreadsheet here, no cross-links. I just want a button to jump to another part of the same spreadsheet. None of the scripts I found online do this, they all open the link in a new window where you have to sign in into Google again and give an untitled project (presumably the script) permission to edit spreadsheets. Using =Hyperlink doesn't look very nice because you have to hover over the link and then click the little window that appears.
I hope a script like that exists, or if anyone knows how to solve this with macros or add-ons I'm all ears.