Although I have recently asked a similar question, I did notice that as I was writing, several answers came up to help me with this problem. I tried to do the changes using the terminal without success. Why is it so hard to make a simple change like in MS Widows by using a small program like synaptics here? Here, I am trying to get used to using Elementary; but still having these problems. When I did use UBUNTU and Linux Mint, it was easy to do. Any help would certainly be appreciated. Thank you very much.