## Configuring QMK for Steno
-Firstly, enable steno in your keymap's Makefile. You should also diable mousekeys to prevent conflicts.
+Firstly, enable steno in your keymap's Makefile. You may also need disable mousekeys, extra keys, or another USB endpoint to prevent conflicts. The builtin USB stack for some processors only supports a certain number of USB endpoints and the virtual serial port needed for steno fills 3 of them.
```Makefile
STENO_ENABLE = yes
# define CDC_OUT_EPNUM MIDI_STREAM_OUT_EPNUM
#endif
-#if defined(__AVR_ATmega32U2__) && CDC_OUT_EPNUM > 4
+#if (defined(__AVR_ATmega32U2__) && CDC_OUT_EPNUM > 4) || \
+ (defined(__AVR_ATmega32U4__) && CDC_OUT_EPNUM > 6)
# error "Endpoints are not available enough to support all functions. Remove some in Makefile.(MOUSEKEY, EXTRAKEY, CONSOLE, NKRO, MIDI, SERIAL)"
#endif