# Horizon ![Horizon](https://i.imgur.com/zR0wnA6.jpg) A simple 52-key (4x14) ortholinear keyboard, powered by an Arduino Pro Micro. * Keyboard Maintainer: [Steven Karrmann](https://github.com/skarrmann) * Hardware Supported: Horizon PCBs, Arduino Pro Micro * Hardware Availability: [Horizon GitHub repository](https://github.com/skarrmann/horizon) Make example for this keyboard (after setting up your build environment): make horizon:default Flashing example for this keyboard: make horizon:default:flash See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs). ## Bootloader Enter the bootloader in 3 ways: * **Bootmagic reset**: Hold down the top left key and plug in the keyboard. * **Physical reset button**: Briefly press the button on the top center of the PCB. * **Keycode in layout**: Press the key mapped to `RESET` if it is available.