Hi @CoenS,
There isn’t really a replace, but you can do a search of your code in two places.
First, in the tree panel, at the very top there is a search box. It allows you to seacrch for elements or text on the page. You can then add the found items to group modify or select them one-by-one
The second is in the code window. If your cursor is in the code and you type
CMD+F (on a Mac or I think Linux, CTRL+F on Windows) it will open a code box at the top. You can do a straight text search or use regex.
Your search will bring up the first match. Hitting the find key again will search for the next instance.
However, neither has replace.
Sorry,
Bob