**Luma3DS** is a program to patch the system software of (New) Nintendo 3DS handheld consoles "on the fly", adding features (such as per-game language settings and debugging capabilities for developers) and removing restrictions enforced by Nintendo (such as the region lock).
To use it, you will need a console capable of running homebrew software on the ARM9 processor. We recommend [Plailect's guide](https://3ds.hacks.guide/) for details on how to get your system ready.
Since Luma3DS v8.0, Luma3DS has its own in-game menu, triggerable by `L+Down+Select` (see the [release notes](https://github.com/AuroraWright/Luma3DS/releases/tag/v8.0)).
To compile, you'll need [armips](https://github.com/Kingcom/armips) and a build of a recent commit of [makerom](https://github.com/profi200/Project_CTR) added to your PATH. You'll also need to install [firmtool](https://github.com/TuxSH/firmtool), its README contains installation instructions.
You can also use all of `sysmodules/rosalina/include/gdb/`, all of `sysmodules/rosalina/source/gdb/`, `sysmodules/rosalina/include/gdb.h`, `sysmodules/rosalina/source/gdb.c`, `sysmodules/rosalina/include/sock_util.h` and `sysmodules/rosalina/source/sock_util.c` under the terms of the GPLv2, as an option. If you choose to do so, you needn't include the GPLv3 notices that are present in the beginning of each of these files.