My Planck Keyboard Layout
The Planck is a 40% computer keyboard with an ortholinear layout (the keys are arranged in columns rather than being staggered as on a traditional typewriter keyboard). The keys are laid out in a 4 by 12 grid, sometimes with a 2-unit wide spacebar on the bottom row (the so-called MIT layout), for a total of 48 or 47 keys.
The board's microcontroller is programmed through the free/libre QMK firmware, which allows for a great deal of flexibility in implementing keyboard layouts. The keymap is organized into layers that can be accessed by holding or tapping function keys.