diff --git a/README.md b/README.md
index fbee859..1e48ac0 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,8 @@ Always available:
 - `command-.`: End presentation
 - `command-shift-f`: Toggle full-screen mode
 
+*Windows and Linux users can use Ctrl instead of Command.*
+
 When presenting (key-control is active):
 
 - `N`/`rightArrow`/`downArrow`/`pageDown`: Next slide
diff --git a/slide-deck.js b/slide-deck.js
index f1020fd..0db190a 100644
--- a/slide-deck.js
+++ b/slide-deck.js
@@ -169,7 +169,7 @@ class slideDeck extends HTMLElement {
     this.shadowRoot.addEventListener('keydown', (event) => {
       event.stopPropagation();
 
-      if ((event.key === 'k' && event.metaKey) || event.key === 'Escape') {
+      if ((event.key === 'k' && this.cmdOrCtrl(event)) || event.key === 'Escape') {
         event.preventDefault();
         this.#controlPanel.close();
       }
@@ -491,9 +491,13 @@ x
     this.goTo(this.#slideFromStore());
   }
 
+  // Detect Ctrl / Cmd modifiers in a platform-agnostic way
+  #cmdOrCtrl = (event) => event.ctrlKey || event.metaKey;
+
   #keyEventActions = (event) => {
+
     // always available
-    if (event.metaKey) {
+    if (this.#cmdOrCtrl(event)) {
       switch (event.key) {
         case 'k':
           event.preventDefault();