qmk_firmware/keyboards/helix/rev3_4rows/oled_display.c

/*

 There are several ways to create your own keymap oled code:

 * Add the oled code to your keymaps/<keymap_name>/keymap.c.
 * Create a new file in your keymaps/<keymap_name>/ directory, add the oled code, and add `SRC + = <filename>` to keymaps/<keymap_name>/rules.mk.
 * Copy keymaps/default/oled_display.c to your keymaps/<keymap_name>/ directory and modify it.

*/