## Description <!-- A few sentences describing the documentation request --> <!-- screenshot, video, or link to mockup/prototype are welcome --> Add the Terrain layer selector and change the background tool UI on [Background Selector](https://docs.mapstore.geosolutionsgroup.com/en/latest/user-guide/background/) section *Documentation section involved* - [x] User Guide - [ ] Developer Guide ## Other useful information Related to #8338
Description
Add the Terrain layer selector and change the background tool UI on Background Selector section
Documentation section involved
Other useful information
Related to #8338