Terracing on specific area

Hello there,

I am working on a terrain, but whenever I add (for example) terraces to my terrain, it affects the whole thing. I just want terraces on specific areas, for example only the bottom of the terrain, leaving the top untouched. I have yet to figure out how to achieve this. I tried it with the “Select Height” selector, but I have no idea how to make it work. :frowning: