2021 — Zmk Leader Key

SPACE + t = Open Terminal SPACE + e = Open Email client SPACE + s = Save current file

Do not reuse a dual-function key (like a layer-tap) as your leader key unless you’re comfortable with timing quirks. Dedicate a seldom-used key—for example, on a 40% board, you could put the leader key where CAPS LOCK used to be. zmk leader key

Once those work, the rest is just imagination. SPACE + t = Open Terminal SPACE +