diff --git a/config/corne.keymap b/config/corne.keymap
index 97e70c5..b7605ce 100644
--- a/config/corne.keymap
+++ b/config/corne.keymap
@@ -166,9 +166,9 @@ SPDX-License-Identifier: MIT
          // label = "FUNCTION";
          bindings = <
             DE_F1 DE_F2   DE_F3 DE_F4 &kp LC(LG(D)) &kp LS(LA(T)) XXX   XXX XXX XXX XXX XXX
-            DE_F5 DE_F6   DE_F7 DE_F8  DE_BSLH  &kp LA(LG(G)) &kp LC(LA(DEL))    XXX   XXX          XXX  &kp C_BRI_UP  XXX
-            DE_F9 DE_F10  DE_F11  DE_F12 &kp LA(LG(V)) &kp LC(LG(SPACE)) &kp LSHIFT    &kp LSHIFT   &kp RSHIFT          XXX  &kp C_BRI_DN  XXX
-                                    &kp LCTRL  &kp LGUI  &kp LALT                      &kp TAB     DE_ACUT &kp LCTRL
+            DE_F5 DE_F6   DE_F7 DE_F8  DE_BSLH  &kp LA(LG(G)) &kp LC(LA(DEL))    XXX   XXX          XXX  DE_BRI_UP  XXX
+            DE_F9 DE_F10  DE_F11  DE_F12 &kp LA(LG(V)) &kp LC(LG(SPACE)) &kp LSHIFT    &kp LSHIFT   &kp RSHIFT          XXX  DE_BRI_DN  XXX
+                                    DE_LCTRL  DE_LGUI  DE_LALT                      DE_TAB     DE_ACUT DE_LCTRL
                                  >;
                          };
       // }}}
@@ -187,10 +187,10 @@ SPDX-License-Identifier: MIT
          //                         XXX  XXX  XXX                      XXX     XXX XXX
          // label = "MEDIA";
          bindings = <
-            XXX &kp LS(LG(NUMBER_1)) &kp LS(LG(NUMBER_2)) &kp LS(LG(NUMBER_3)) &kp LC(LG(LA(SLASH))) XXX &kp LA(LG(NUMBER_1)) &kp LA(LG(NUMBER_2)) &kp LANG1    &kp LANG2  &kp C_STOP  &kp DEL
-            XXX &kp LS(LG(NUMBER_4)) &kp LS(LG(NUMBER_5)) XXX XXX XXX &kp LA(LG(NUMBER_3)) &kp LA(LG(NUMBER_4))   &kp LANG3          XXX &kp C_VOL_UP  &kp C_PLAY_PAUSE
-            XXX XXX XXX XXX XXX XXX XXX    XXX   &kp C_MUTE      &kp K_PREV  &kp C_VOL_DN  &kp C_NEXT
-                                    &kp LCTRL  &kp LGUI  &kp LALT                      &kp SPACE   &kp RALT &kp LCTRL
+            XXX &kp LS(LG(NUMBER_1)) &kp LS(LG(NUMBER_2)) &kp LS(LG(NUMBER_3)) &kp LC(LG(LA(SLASH))) XXX &kp LA(LG(NUMBER_1)) &kp LA(LG(NUMBER_2)) &kp LANG1    &kp LANG2  DE_STOP  DE_DEL
+            XXX &kp LS(LG(NUMBER_4)) &kp LS(LG(NUMBER_5)) XXX XXX XXX &kp LA(LG(NUMBER_3)) &kp LA(LG(NUMBER_4))   &kp LANG3          XXX DE_VOL_UP  DE_PLAY
+            XXX XXX XXX XXX XXX XXX XXX    XXX   DE_MUTE      DE_PREV  DE_VOL_DN  DE_NEXT
+                                    DE_LCTRL  DE_LGUI  DE_LALT                      DE_SPACE   DE_RALT DE_LCTRL
                                  >;
                          };
       // }}}
diff --git a/config/keymap_german_mac_iso_zmk.h b/config/keymap_german_mac_iso_zmk.h
index 8667c16..876b856 100644
--- a/config/keymap_german_mac_iso_zmk.h
+++ b/config/keymap_german_mac_iso_zmk.h
@@ -39,9 +39,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define ___ &trans
 
 // CONTROL CMD/WINDOWS SHIFT ALT/META/OPTION
-#define DE_LCTRL &kp LCTRL
-#define DE_RCTRL &kp RCTRL
-#define DE_LGUI &kp LGUI
+#define DE_LCTRL &kp LCTRL // left control
+#define DE_RCTRL &kp RCTRL // right control
+#define DE_LGUI &kp LGUI   // left cmd
 #define DE_RGUI &kp RGUI
 #define DE_LALT &kp LALT
 #define DE_RALT &kp RALT
@@ -54,11 +54,13 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DE_DOWN &kp DOWN
 #define DE_RIGHT &kp RIGHT
 
-// SPACE CAPS TAB ENTER
-#define DE_SPACE &kp SPACE
-#define DE_CAPS &kp CAPS
-#define DE_BSPC &kp BSPC
-#define DE_RET &kp RET
+// SPACE CAPS TAB ENTER BACKSPACE ESCAPE DELETE
+#define DE_SPACE &kp SPACE // Space
+#define DE_CAPS &kp CAPS   // Caps Lock
+#define DE_BSPC &kp BSPC   // Backspace
+#define DE_RET &kp RET     // Enter
+#define DE_TAB &kp TAB     // Tab
+#define DE_DEL &kp DEL     // Delete
 
 // PAGE UP PAGE DOWN HOME END
 #define DE_PG_UP &kp PG_UP
@@ -92,6 +94,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DE_F23 &kp F23
 #define DE_F24 &kp F24
 
+// SOUND / VOLUME
+#define DE_VOL_UP &kp C_VOL_UP
+#define DE_VOL_DN &kp C_VOL_DOWN
+#define DE_MUTE &kp C_MUTE
+#define DE_NEXT &kp C_NEXT
+#define DE_PREV &kp K_PREV
+#define DE_STOP &kp C_STOP
+#define DE_PLAY &kp C_PLAY_PAUSE
+
+// DISPLAY BRIGHTNESS
+#define DE_BRI_UP &kp C_BRI_UP
+#define DE_BRI_DN &kp C_BRI_DN
+
 // Apple "Globe" key
 // https://github.com/zmkfirmware/zmk/issues/947
 // #define GLOBE CAPSLOCK