Are they "grip strips"? Neat site...I like the animation which helps this "senior brain" understand better how it works.
jcrow, know what you mean about those "empty spaces where words should be". That happens to me all the time...the harder I try to remember the more it flitters away! Then it will pop into my mind at the most unusual times!! Getting older is not for sissies. We have so much knowledge to pass on....if we just could remember it!!