Keyboard

Layers

• L1 / Base Default QWERTY. The thumbs carry the modifiers: ⌥, ⌃ Ctrl, ␣ Space and ⇥ Tab on the left; ↵ Enter, ⌥ and ✦ Hyper (⇧⌃⌥⌘) on the right.
• L2 / Symbols Hold S2, right thumb Brackets sit under the left index and middle fingers, with the other symbols around them. Arrows go on H J K L, vim-style.
• L3 / Media Hold S3, left thumb Volume (V× mutes) on the left home row and playback below it, with ⌘Q in the corner. Display brightness and sleep on the right.
• L4 / Navigation Tap L4, top left, to lock it An inverted T of arrows under the right hand, for when I stay on them for a while.

✦ Hyper presses ⇧ Shift, ⌃ Ctrl, ⌥ Option and ⌘ Command at once. Apps almost never use that combination, so it never clashes with their shortcuts, and it works as a safe base for global ones.