Embedded Files
Home-row mods are keys on the home row of a keyboard that act as regular letters when tapped but function as modifier keys (like Ctrl, Alt, or Shift) when held. This allows for faster, more ergonomic typing by reducing finger movement and enabling shortcuts without leaving the home row.
Check out the video and the HRM Explorer below.
Home-row order GACS vs CAGS
more details on
https://precondition.github.io/home-row-mods
Bilateral Home-Row Mods (BHRM)
What is it?
Bilateral combination enforcement for home row mods is a configuration where modifier keys (like Ctrl, Shift, Alt) on the home row only work if you press another key with the opposite hand.
Why does this matter?
Fewer Mistakes: you’re less likely to accidentally trigger a modifier key when typing with one hand.
More Comfortable Typing It avoids weird hand stretches or finger pain from pressing two keys with the same hand.
Keychron VIA
Keychron VIA
Keychron: basic HRM using VIA (Visual Input Editor for Arm)
Both ZMK and QMK support Homerow Mods (HRM). See my short video of howto configure HRM in Via for my Keychron K11 Pro keyboard.
In the via app paste these commands into ANY (under special):
MT(MOD_LGUI,KC_A) MT(MOD_LALT,KC_S) MT(MOD_LCTL,KC_D) MT(MOD_LSFT,KC_F)
MT(MOD_RSFT,KC_J)MT(MOD_RCTL,KC_K)MT(MOD_RALT,KC_L)MT(MOD_RGUI,KC_SCLN)
Kinesis Freestyle Edge
Kinesis Freestyle Edge
Basic HRM using FS Pro SmartSet App
Manually edit your layout1.txt file and simply add the following lines. Avoid using the Kinesis SmartSet App GUI, as it does not allow you to perform this action in the main layer.
[a]>[a][t&h250][lwin]
[s]>[s][t&h250][lalt]
[d]>[d][t&h250][lctrl]
[f]>[f][t&h250][lshft]
[j]>[j][t&h250][rshft]
[k]>[k][t&h250][lctrl]
[l]>[l][t&h250][lalt]
[colon]>[colon][t&h250][lwin]
ZMK - MoErgo Glove80
ZMK - MoErgo Glove80
Advanced HRM
Thanks to Sanaku and Glorious Engrammer we have Bilateral HRM in TailorKey.
Or see the example in the ZMK doc.
Operating System level
Operating System level
All other : Operating system level (e.g. your Windows laptop)
Without a mechanical keyboard (on OS level) can be done with kmonad or Kanata
Miryoku has a port for kmonad, here
Below is a config file for Kanata with support for bilateral combinations. It's really easy to setup:
1. Goto https://github.com/jtroo/kanata/releases - scroll down and download the window executable.
2. create a config file kanata.cfg in the same directory as the executable
3. from terminal run kanata.exe alternative: kanata.exe --cfg c:\test2.kbd --debug
You can tune the green values based on your typing speed. Try double them if you have issues.
Examples
Examples
EXAMPLE 1: Simple homerow mods for kanata
(defcfg process-unmapped-keys yes)(defsrc a s d f j k l ;)(defvar tap-time 200 hold-time 150)(defalias a (tap-hold $tap-time $hold-time a lmet) s (tap-hold $tap-time $hold-time s lalt) d (tap-hold $tap-time $hold-time d lctl) f (tap-hold $tap-time $hold-time f lsft) j (tap-hold $tap-time $hold-time j rsft) k (tap-hold $tap-time $hold-time k rctl) l (tap-hold $tap-time $hold-time l ralt) ; (tap-hold $tap-time $hold-time ; rmet))(deflayer base @a @s @d @f @j @k @l @;)
EXAMPLE 2: Advanced homerow mods for kanata (Bilateral)
(defcfg process-unmapped-keys yes)(defsrc a s d f j k l ;)(defvar tap-time 200 hold-time 150
left-hand-keys ( q w e r t a s d f g z x c v b ) right-hand-keys ( y u i o p h j k l ; n m , . / ))(deflayer base @a @s @d @f @j @k @l @;)
(deflayer nomods a s d f j k l ;)(deffakekeys to-base (layer-switch base))(defalias tap (multi (layer-switch nomods) (on-idle-fakekey to-base tap 20) )
a (tap-hold-release-keys $tap-time $hold-time (multi a @tap) lmet $left-hand-keys) s (tap-hold-release-keys $tap-time $hold-time (multi s @tap) lalt $left-hand-keys) d (tap-hold-release-keys $tap-time $hold-time (multi d @tap) lctl $left-hand-keys) f (tap-hold-release-keys $tap-time $hold-time (multi f @tap) lsft $left-hand-keys) j (tap-hold-release-keys $tap-time $hold-time (multi j @tap) rsft $right-hand-keys) k (tap-hold-release-keys $tap-time $hold-time (multi k @tap) rctl $right-hand-keys) l (tap-hold-release-keys $tap-time $hold-time (multi l @tap) ralt $right-hand-keys) ; (tap-hold-release-keys $tap-time $hold-time (multi ; @tap) rmet $right-hand-keys))
key: homerow modifiers homerow mods home row mod kinesis freestyle pro kinesis freestyle edge keychron moergo mo-ergo glove80 glove Miryoku
EXAMPLE 3: Advanced homerow mods for kanata with cursor layer and tumb cluster for laptop
(defcfg process-unmapped-keys yes )
(defsrc grv 1 2 3 4 5 6 7 8 9 0 - = bspc tab q w e r t y u i o p [ ] \ caps a s d f g h j k l ; ' ret lsft z x c v b n m , . / rsft lctl lmet lalt spc ralt rmet rctl)
(defvar tap-time 300 ;; Used for Homerow Modifiers hold-time 400 ;; Used for Homerow Modifiers
left-hand-keys ( q w e r t a s d f g z x c v b ) right-hand-keys ( y u i o p h j k l ; n m , . / ))
(deflayer base grv 1 2 3 4 5 6 7 8 9 0 - = bspc tab q w e r t y u i o p [ ] \ @caps @a @s @d @f g h @j @k @l @; ' ret lsft z x c v b n m , . / @rsft lctl @lmet @lalt spc @ralt rmet rctl)
(deflayer nomods grv 1 2 3 4 5 6 7 8 9 0 - = bspc tab q w e r t y u i o p [ ] \ caps a s d f g h j k l ; ' ret lsft z x c v b n m , . / rsft lctl lmet lalt spc ralt rmet rctl)
(deflayer cursor @grv 1 2 3 del ins ins del 8 9 0 - = bspc A-tab @ssft C-y C-z bks C-x C-x bks C-z C-y @ssft [ ] \ caps a s d f C-c C-c left up down rght ' ret lsft C-f @sword @sline C-a C-v C-v home pgup pgdn end rsft lctl lmet lalt spc ralt rmet rctl)
(deffakekeys to-base (layer-switch base))
(defalias 2curs(layer-while-held cursor) ;; Helper to cursor layer (used in for Left Alt) caps (tap-hold 200 200 esc caps) ;; Caps Lock: Tap = Escape Hold = Caps lmet (tap-hold 200 200 del lmet) ;; Windows Key: Tap = Delete Hold = Windows Key lalt (tap-hold 200 200 bks @2curs) ;; Left Alt: Tap = Backspace Hold = Cursor Layer ralt (tap-hold 200 200 ret ralt) ;; Right Alt: Tap = Return Hold = Right Alt rsft (tap-dance 200 (rsft(caps-word 2000))) ;; Right Shift: Tap = Right Shift Double = Caps word
;; ** Cursor Layer specials ssft (one-shot-release-pcancel 2000 lsft) ;; Sticky shift sline (macro home S-(end)) ;; Select line sword (macro C-(left)S-C-(rght)) ;; Select word ;; xline (macro S-(end)) ;; Extend line (not in use) ;; xword (macro S-C-(rght)) ;; Extend word (not in use) grv (macro S-i spc a m spc S-(h a p p y) spc m y S-f r S-i e S-n d spc (unicode 🙃) ) ;; sample macro tap (multi (layer-switch nomods) (on-idle-fakekey to-base tap 20) )
;; ** Homerow Modifiers a (tap-hold-release-keys $tap-time $hold-time (multi a @tap) lmet $left-hand-keys) s (tap-hold-release-keys $tap-time $hold-time (multi s @tap) lalt $left-hand-keys) d (tap-hold-release-keys $tap-time $hold-time (multi d @tap) lctl $left-hand-keys) f (tap-hold-release-keys $tap-time $hold-time (multi f @tap) lsft $left-hand-keys) j (tap-hold-release-keys $tap-time $hold-time (multi j @tap) rsft $right-hand-keys) k (tap-hold-release-keys $tap-time $hold-time (multi k @tap) rctl $right-hand-keys) l (tap-hold-release-keys $tap-time $hold-time (multi l @tap) ralt $right-hand-keys) ; (tap-hold-release-keys $tap-time $hold-time (multi ; @tap) rmet $right-hand-keys))
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