qmk_firmware/docs/feature_space_cadet_shift_enter.md

Space Cadet Shift Enter

Based on the Space Cadet Shift feature. Tap the Shift key on its own, and it behaves like Enter. When held, the Shift functions as normal.

Usage

Replace any Shift key in your keymap with KC_SFTENT (Shift, Enter), and you're done.

Keycodes

Keycode	Description
KC_SFTENT	Right Shift when held, Enter when tapped

Caveats

As with Space Cadet Shift, this feature may conflict with Command, so it should be disabled in your rules.mk with:

COMMAND_ENABLE = no

This feature also uses the same timers as Space Cadet Shift, so using them in tandem may produce strange results.

Configuration

By default Space Cadet assumes a US ANSI layout, but if you'd like to use a different key for Enter, you can redefine it in your config.h:

Define	Default	Description
SFTENT_KEY	KC_ENT	The keycode to send when the Shift key is tapped