The little raised lines or bumps on the F and J keys are tactile markers. Basically, they are there to assist keyboard users in finger positioning without the need for looking down. The mentioned keys ...

Keyboards have small bumps on the F and J keys. These help people type without looking. The bumps guide fingers to the right spot. This makes typing faster and more accurate. June E. Botich patented ...

Ever noticed the tiny bumps on the F and J keys of your keyboard? They're not there by accident. These small lines help your fingers find the correct position without needing to look. When typing, ...