When you see these two ridges at the button of F and J buttons on your keyboard, laptop or any keyboard – don’t bother. But it’s interesting to know what they are for?

For many people who touch-type (type without looking), they use these two ridges on F and J buttons to determine the position of their fingers on the keyboard. The proper position for touch typists is to place the index finger of their left hand on F and the index finger of their right hand on J before they type. In this manner, they know where their fingers are at.

But do these ridges work for the blind? These ridges are there for a reason and it isn’t just for the blind. They are called orientation ridges for the reason that they provide all good typist’s reference to wherever they are on the keyboard because all other keys do not have them. Nearly all people don’t notice them as they are not distinct in size.

So basically, the two ridges that are on the buttons F & J are used for those who know how to type correctly.

But wait!

For keyboards that have the numeric pad, you’ll see the ridge on key #5. Before you type your numbers, find that ridge and put the middle finger on it as reference point.

Anyhow, for blind people, they have their own brail keyboard to teach them how to type.