qmk_keymaps/keyboards/crkbd/keymaps/sajenim/layers.h

// Our super useful layers, why we run qmk exclusively.
enum layers {
  L_CANARY, // This layout is the result of collaboration between many of the top layout creators from the AKL community.
  L_LOWER,  // OLKB naming convention, Contains our numpad and function keys.
  L_RAISE,  // OLKB naming convention, Contains our symbols.
  L_ADJUST, // OLKB naming convention, Contains keyboard related settings.
  L_EXTEND, // From the colemak community, Brings navigation and editing to the home position.
  L_MACRO,  // Extra extend functions, Brings mouse keys to the home position and contains our macros.
};