diff --git a/readme.md b/readme.md
index c10e4b2..94b4b50 100644
--- a/readme.md
+++ b/readme.md
@@ -12,7 +12,7 @@ It is ported from my QMK configuration, which in turn is heavily inspired by Man
 - most symbols can be accessed from the base layer via combos
 - sticky shift on right thumb, double-tap activates caps-word
 - backspace morphs into delete when shifted
-- unicode layer with Greek letters for mathematical typesetting (not yet ported to ZMK)
+- unicode layer with Greek letters for mathematical typesetting (implemented via preprocessor macros[^2]) 
 
 ![](img/keymap.png)
 
@@ -27,11 +27,12 @@ and (2) make them easy to remember. Specifically:
   (subscript `_` aligns with superscript `^`; minus `-` aligns with `+`; division `/`
   aligns with multiplication `*`; logical-or `|` aligns with logical-and `&`; backslash
   `\` aligns horizontally with forward slash `/`)
-- parenthesis, brackets, braces and punctuation are on the right-hand side for easy
-  usage when typing numbers
+- `!` and `?` are on home-row position for prime access
+- parenthesis, brackets and braces are on the right-hand side for easy access when
+  typing numbers
 - a numlock shortcut (on `W + P`) is on the left-hand side for one-handed number-mode
 - shortcuts for cut (on `X + D`), copy, and paste are on the left-hand side for
-  one-handed usage when using the mouse
+  one-handed usage when working with the mouse
 
 [^1]: I use a 36-key layout per default. Additional thumb keys can be configured with
     the `EXTRA_BOT_L` and `EXTRA_BOT_R` macros. Additional "middle-keys" can be
@@ -45,3 +46,8 @@ and (2) make them easy to remember. Specifically:
     first key on the **L**eft **T**op-row and ranging to `RB4` for the last key on the
     **R**ight **B**ottom-row. They need to be defined in the shield-specific keymap-file
     *before* sourcing the common `base.keymap`.
+
+[^2]: This is my attempt at a simple user-space solution until unicode is natively
+    supported. Check out `unicode.dtsi` for details and read
+    [my write up here](https://github.com/zmkfirmware/zmk/issues/232#issuecomment-1163833880)
+    for a few more pointers and some caveats.