manner, manor

Manner or manner is a somewhat old-fashioned way of saying "way" or "style", when discussing human behavior--
His manner was cool when they met again. She could tell that he was still angry.
His formal manner made people wonder if he was foreign.
They do everything in a grand manner.
Most people are more familiar with the term "manners", meaning the way people interact with others, especially strangers--
His manners always put everyone at ease.
People with nice manners never give offense.
Manner is also a formal or old-fashioned way to describe directions or procedure to be followed when doing a task--
Proceed in the following manner: attach tab A to slot B....
"In this manner shall ye pray..."

Manor or manor means the large house that was the seat of a feudal demesne--
The farm hand took some of the corn to the manor house.
When the knight returned from the war, he found the manor house in disrepair.
They live in a grand manor.

Now that you know that, you can say--
"He affected the manner of a lord of the manor, although they lived in a townhouse."

Note--spell check can't help if you type "manor" instead of "man or", since both are English words or phrases--
He wanted to live in the manor.
Did you need a coat for a man or a woman?