# Hyper key (/features/hyper-key)



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  This page is a stub.
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Hold Caps Lock and Lumi stamps a configurable modifier set — any combination of
Control, Shift, Command and Option — onto whatever you press next. It turns one
of the largest and least-used keys on the keyboard into a modifier nothing else
on the system claims, so combinations built on it never collide with an
application's own.

Needs the [Accessibility permission](/get-started/permissions).

## To write [#to-write]

* Choosing the modifier set, and why ⌃⌥⌘ is the default
* What a tap of Caps Lock does instead of a hold
* Getting the original Caps Lock behaviour back