To everyone: Thank you all for your suggestions. Yes I do have Zorin core. And the reason I could not see what I was typing was because the box was at the bottom of the screen. I have just worked out how to solve this problem.
Anyway, Mr_Magoo put me on the right track. I was able to turn off Zorin Menu and install another one. Since I am a newbie, I am not yet skilled with programming in the terminal. And there were too many alternatives when I did the the search. So it was impossible to select one. But I did find a topic " Are there alternatives to the pre-installed menu?" (Are there alternatives to the pre-installed menu?) in which Arc Menu was mentioned as the best alternative. I installed it and adjusted the setting to what I wanted, and it is just what I wanted.
Next, I plan to sort the apps into categories with the "Show Applications" button. You can put the apps into folders the same way you can with a cell phone. Again, thanks to you all.