Improve handedness documentation for Architeuthis Dux (#15051)

Co-authored-by: filterpaper <filterpaper@localhost>

1 files changed, 17 insertions, 10 deletions

diff --git a/keyboards/a_dux/readme.md b/keyboards/a_dux/readme.md
index aaf678ec74..ae06fa9faa 100644
--- a/keyboards/a_dux/readme.md
+++ b/keyboards/a_dux/readme.md
@@ -8,7 +8,7 @@ AKA A. dux, A.D., "Giant squid"
 
 Thank you [Perce](https://madebyperce.com/) for the logo.
 
-## Cases can be found here:
+## Case Options
 
 * [Flat Case](https://github.com/madebyperce/aduxcase)
 * [Tented Case](https://github.com/jdart/adux-tent)
@@ -16,23 +16,30 @@ Thank you [Perce](https://madebyperce.com/) for the logo.
 
 ## Keyboard Info
 
-* Keyboard Maintainer: [tapioki](https://github.com/tapioki)
+* Keyboard Maintainer: [@tapioki](https://github.com/tapioki)
 * Hardware Supported: Architeuthis Dux
-* Hardware Availability: [GitHub](https://github.com/tapioki/cephalopoda/tree/main/Architeuthis%20dux)
+* Hardware Availability: Order PCBs with gerber files from the [repository](https://github.com/tapioki/cephalopoda/tree/main/Architeuthis%20dux)
 
-Make examples for this keyboard (after setting up your build environment):
+Make example for this keyboard (after setting up your build environment):
 
     make a_dux:default
 
-    make a_dux:default:avrdude-split-left
-    make a_dux:default:avrdude-split-right
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Setting Handedness
+
+Keyboard uses [handedness by EEPROM](https://docs.qmk.fm/#/feature_split_keyboard?id=handedness-by-eeprom) as default. The make commands are:
+
+    make a_dux:default:dfu-split-left
+    make a_dux:default:dfu-split-right
+
+[QMK Toolbox](http://qmk.fm/toolbox) can also be used to set EEPROM handedness. Place the controller in bootloader mode and select menu option Tools -> EEPROM -> Set Left/Right Hand
 
 ## Bootloader
 
 Enter the bootloader in 3 ways:
 
-* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard. (With `EE_HANDS` configured, hold down the top right key on the right half to place the right controller in bootloader mode)
-* **Physical reset**: Briefly short the RST and GND pins on the microcontroller using tweezers, a paperclip, or any other conductive material.
-* **Keycode in layout**: Press the key mapped to `RESET` if it is available
+* **Bootmagic reset**: Hold down the top left key on the left half (or the top right right key on the right half) and plug in the controller on that side.
+* **Physical reset pins**: Briefly short the RST and GND pins on the microcontroller using tweezers, a paperclip, or any other conductive material.
+* **Keycode in layout**: Press the key mapped to `RESET` if it is configured.
 
-See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).