# BackEnd Customization

### Backend customization

![](https://460755057-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl1d49lBAg3jv6axyszMB%2Fuploads%2FH7mQkpJHs5C5epSAjrnr%2Fbackend.png?alt=media\&token=6df9bcdd-4116-4b59-bc3a-d846681e0f41)

#### 1. Theme options

![](https://460755057-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl1d49lBAg3jv6axyszMB%2Fuploads%2FPDgf6HuKd4rdwNUuKajK%2Fthemeoption.png?alt=media\&token=ce381654-cbd6-49e5-9803-d0ca29b5b1e7)

#### 2. Sidebar options

![](https://460755057-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl1d49lBAg3jv6axyszMB%2Fuploads%2FL77EiAOaSTgFU0W6b5CL%2Fsidebar.png?alt=media\&token=e7c111bd-c24f-4faa-9fa3-403e47a9ac39)

#### 3. Custom css

![](https://460755057-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl1d49lBAg3jv6axyszMB%2Fuploads%2FFg75J1pNAJb32Cb7HcuY%2Fcustomcss.png?alt=media\&token=de5e7316-3252-4015-9e98-3ac65567a249)