I learned something new today and thought I'd share in case anyone else didn't know this.
Let's say you've built some steps but decide you don't like the style you picked. In the past, I would delete the steps and build new ones in the new style. By accident today, I learned you can simply click on the new style, hover over the stairs you can to change and click - the stair's look changes to the new style.
I can't believe I never thought to try this before!