The raised bumps
on the ‘F’ and ‘J’ keys are placed there for proper position of fingers while
typing. For ease of use of the keyboard, these keys have ridges on them so that
if you are speed-typing without looking at the keyboard a lot, then the ridges will
help you position your fingers if in case you fly off the handle.
For the correct
typing position, the ridges are placed on those two keys so that you place your
index fingers on them.
Positioning your
left index finger on the ‘F’ key and your right index finger on the ‘J’ key
leaves the other three fingers of your left hand to rest on the ‘D,’ ‘S,’ and
‘A’ keys while the remaining fingers of your right hand rest on the ‘K,’ ‘L,’
and ‘:/;’ (colon) keys. The thumbs of both hands should ideally rest on the
space bar.
These improvements
came to keyboards as a result of a patent filed by June E. Botich in 2002 and
all keyboards manufactured after that contain the ridges.