You had written:
Yes, it is. Here's how: for each line that you want to be
beneath the next text line in one cell, hit "CTRL"
and "ENTER" att he same time, instead of just
hitting "Enter." For example,
XYZ Company <CTRL+ENTER>
222 Excel Street <CTRL+ENTER>
Yorkmass, IL 22308 <CTRL+ENTER>