I'm new to excel and I am extremely impressed with the sophistication of it. I'm not even sure if this is possible, but is there a way to underline text buy just clicking or double clicking on it, with some code or something?

Exmaple:
apple, orange, pear


After clicking or double clicking on orange:
apple, orange, pear

Any help would be great and I appreciate it some one could tell if it's not even possible at all.

Thank You