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.”

Hi, sorry for this very late answer. If the question is still actual, the text can be changed in one go just by selecting all the needed text layers and choosing the preferred style.
You may also want to check our Youtube channel with Lunacy video-tutorials: https://www.youtube.com/channel/UCIp9WVc3HlNF3TGqGvuDsnQ/videos

Let us know if you have any questions left, we will be glad to be of help!