# RTRTR User Manual The Official [RTRTR](https://github.com/NLnetLabs/rtrtr) User Manual, published at [rtrtr.docs.nlnetlabs.nl](https://rtrtr.docs.nlnetlabs.nl) ## Style Guide This manual uses British English. Since there is quite a bit of leeway in English style, we use the [European Commission’s English Style Guide] as guidance. [European Commission’s English Style Guide]: https://ec.europa.eu/info/sites/info/files/styleguide_english_dgt_en.pdf