As was mentioned in your previous post, the answer is yes.
If you want to make change permanent, I suggest pressing F1 for Help. when you do, you'll see the following info:
"Change the Normal template (Normal.dotm )
The Normal.dotm template opens whenever you start Microsoft Office Word, and it includes default styles and customizations that determine the basic look of a document."
Help has an excellent resource for learning about making changes in template and many of the features of Word.