HOW MANY TIMES AM I GONNA GET HIT WITH "Internal server error. Wrong answer or expired captcha." AND "Name is too long, keep it under 32 characters." FUCKING FIX YOUR SHIT DON'T YOU HAVE GEEK PRIDE IN YOUR AUTISM YOU WORTHLESS ADMINS?

Copy-pasta's going here as this image board near the top of AllChan's Top 4Chan Alternatives page, because I'm certainly fucking not registering on plebbit or twatter just to make a simple inquiry:

What do you call it, when you press hold a letter or number on your physical keyboard, that determines how fast that number or letter gets "auto-typed" and how short the delay is before inserting said character?

I'm using Fluxbox on MX Linux, and I don't know what that setting is called, meaning I don't even know what man page or setting/system application's called that's buried somewhere to look up and RTFM.

If it matters: here's the neofetch for this 11-yo PC which hasn't been updated for several years. It doesn't say which exact version of Fluxbox and which exact version of MX is being used, don't know which exact key terms to web-search to find out how to show that info, and it's likely irrelevant.