How to replace code in all pages? I imported a website (see www.agirazul.com.br) and some menus didn’t work before. I would like to change the code on all current pages on the site. How do I do?
Welcome onboard @jbaguiar! 
You have imported a website online into Sparkle, correct?
If so, there is no code to play with unless you introduce a Sparkle Embed widget.
When you click on elements in your Sparkle canvas you will see what you can do with it in the right hand panel of the Sparkle UI. From there you can also link to other pages within your Sparkle document… or to an external link.
To get more of an idea in how to use Sparkle you can check out these Sparkle app videos - https://www.youtube.com/@SparkleWebsiteBuilder/videos