Prettify

To make something or someone look pretty, more beautiful or attractive.
Like putting make-up on and dressing up.
Or when you customize something to make it look pretty.
Or cleaning something up.
It's the act of making something look better.

Bob " What took you so long? "
Alice " I'm sorry, I needed to prettify myself some more."

"I prettified my room, I was tired of the old look"