What is Auto Replacing for Text?


I’m trying to understand what the paragraph below means when it comes to Auto Replacing. I was wondering is it similar to the Sketch AppStyle Text”. Because I want to change the font of whole document without having to do every individual text box that has the font I’m changing. I don’t know how to do that can someone tell me or show me how. Thanks.

Auto Replacing
In Lunacy, you only have to replace the font once throughout the entire document, while other editors require you to do it for every font instance.”