fn · system zoom
Zoom anywhere
with fn.
System-level magnification, on a key you already own. One hand. Every app.
How it works
Zoom in, out, and reset with one key each
Reading small PDF text? fn + + zooms in, fn + - zooms out, fn + 0 resets to 100%. Your hands stay on the keyboard.
Set your own zoom step size
10% step for fine tuning, 50% for fast jumps. Different setups for code review and doc reading.
Default bindings
Zoom In
fn + +
Zoom Out
fn + -
Reset
fn + 0
Why this exists
macOS has system zoom built in, but the default shortcuts need two hands and are easy to forget. fns binds zoom to the fn key — one hand, no context switch, no menu hunt.