diff --git a/packages/core/pattern.mjs b/packages/core/pattern.mjs
index 3384f79c..66e75083 100644
--- a/packages/core/pattern.mjs
+++ b/packages/core/pattern.mjs
@@ -1582,6 +1582,24 @@ export const range2 = register('range2', function (min, max, pat) {
   return pat.fromBipolar()._range(min, max);
 });
 
+/**
+ * Allows dividing numbers via list notation using ":".
+ * Returns a new pattern with just numbers.
+ * @name ratio
+ * @memberof Pattern
+ * @returns Pattern
+ * @example
+ * ratio("1, 5:4, 3:2").mul(110).freq().s("piano").slow(2)
+ */
+export const ratio = register('ratio', (pat) =>
+  pat.fmap((v) => {
+    if (!Array.isArray(v)) {
+      return v;
+    }
+    return v.slice(1).reduce((acc, n) => acc / n, v[0]);
+  }),
+);
+
 //////////////////////////////////////////////////////////////////////
 // Structural and temporal transformations
 
diff --git a/packages/react/src/components/CodeMirror6.jsx b/packages/react/src/components/CodeMirror6.jsx
index ebe3dd11..651c7c88 100644
--- a/packages/react/src/components/CodeMirror6.jsx
+++ b/packages/react/src/components/CodeMirror6.jsx
@@ -2,12 +2,12 @@ import React, { useMemo } from 'react';
 import _CodeMirror from '@uiw/react-codemirror';
 import { EditorView, Decoration } from '@codemirror/view';
 import { StateField, StateEffect } from '@codemirror/state';
-import { javascript } from '@codemirror/lang-javascript';
+import { javascript, javascriptLanguage } from '@codemirror/lang-javascript';
 import strudelTheme from '../themes/strudel-theme';
 import './style.css';
 import { useCallback } from 'react';
 import { autocompletion } from '@codemirror/autocomplete';
-//import { strudelAutocomplete } from './Autocomplete';
+import { strudelAutocomplete } from './Autocomplete';
 import { vim } from '@replit/codemirror-vim';
 import { emacs } from '@replit/codemirror-emacs';
 
@@ -92,9 +92,7 @@ const staticExtensions = [
   javascript(),
   highlightField,
   flashField,
-  // javascriptLanguage.data.of({ autocomplete: strudelAutocomplete }),
-  // autocompletion({ override: [strudelAutocomplete] }),
-  autocompletion({ override: [] }), // wait for https://github.com/uiwjs/react-codemirror/pull/458
+  javascriptLanguage.data.of({ autocomplete: strudelAutocomplete }),
 ];
 
 export default function CodeMirror({
@@ -105,6 +103,7 @@ export default function CodeMirror({
   theme,
   keybindings,
   isLineNumbersDisplayed,
+  isAutoCompletionEnabled,
   fontSize = 18,
   fontFamily = 'monospace',
   options,
@@ -116,12 +115,14 @@ export default function CodeMirror({
     },
     [onChange],
   );
+
   const handleOnCreateEditor = useCallback(
     (view) => {
       onViewChanged?.(view);
     },
     [onViewChanged],
   );
+
   const handleOnUpdate = useCallback(
     (viewUpdate) => {
       if (viewUpdate.selectionSet && onSelectionChange) {
@@ -130,16 +131,27 @@ export default function CodeMirror({
     },
     [onSelectionChange],
   );
+
   const extensions = useMemo(() => {
+    let _extensions = [...staticExtensions];
     let bindings = {
       vim,
       emacs,
     };
+
     if (bindings[keybindings]) {
-      return [...staticExtensions, bindings[keybindings]()];
+      _extensions.push(bindings[keybindings]());
     }
-    return staticExtensions;
-  }, [keybindings]);
+
+    if (isAutoCompletionEnabled) {
+      _extensions.push(javascriptLanguage.data.of({ autocomplete: strudelAutocomplete }));
+    } else {
+      _extensions.push(autocompletion({ override: [] }));
+    }
+
+    return _extensions;
+  }, [keybindings, isAutoCompletionEnabled]);
+
   return (
     <div style={{ fontSize, fontFamily }} className="w-full">
       <_CodeMirror
diff --git a/packages/react/src/components/style.css b/packages/react/src/components/style.css
index 6d5d0805..d61c6619 100644
--- a/packages/react/src/components/style.css
+++ b/packages/react/src/components/style.css
@@ -24,3 +24,7 @@
 .cm-theme-light {
   width: 100%;
 }
+
+footer {
+  z-index: 0 !important;
+}
diff --git a/test/__snapshots__/examples.test.mjs.snap b/test/__snapshots__/examples.test.mjs.snap
index db375804..d452cabd 100644
--- a/test/__snapshots__/examples.test.mjs.snap
+++ b/test/__snapshots__/examples.test.mjs.snap
@@ -3193,6 +3193,23 @@ exports[`runs examples > example "rarely" example index 0 1`] = `
 ]
 `;
 
+exports[`runs examples > example "ratio" example index 0 1`] = `
+[
+  "[ (0/1 → 1/1) ⇝ 2/1 | freq:110 s:piano ]",
+  "[ (0/1 → 1/1) ⇝ 2/1 | freq:137.5 s:piano ]",
+  "[ (0/1 → 1/1) ⇝ 2/1 | freq:165 s:piano ]",
+  "[ 0/1 ⇜ (1/1 → 2/1) | freq:110 s:piano ]",
+  "[ 0/1 ⇜ (1/1 → 2/1) | freq:137.5 s:piano ]",
+  "[ 0/1 ⇜ (1/1 → 2/1) | freq:165 s:piano ]",
+  "[ (2/1 → 3/1) ⇝ 4/1 | freq:110 s:piano ]",
+  "[ (2/1 → 3/1) ⇝ 4/1 | freq:137.5 s:piano ]",
+  "[ (2/1 → 3/1) ⇝ 4/1 | freq:165 s:piano ]",
+  "[ 2/1 ⇜ (3/1 → 4/1) | freq:110 s:piano ]",
+  "[ 2/1 ⇜ (3/1 → 4/1) | freq:137.5 s:piano ]",
+  "[ 2/1 ⇜ (3/1 → 4/1) | freq:165 s:piano ]",
+]
+`;
+
 exports[`runs examples > example "release" example index 0 1`] = `
 [
   "[ 0/1 → 1/4 | note:c3 release:0 ]",
diff --git a/website/src/pages/functions/value-modifiers.mdx b/website/src/pages/functions/value-modifiers.mdx
index 81874672..94372e75 100644
--- a/website/src/pages/functions/value-modifiers.mdx
+++ b/website/src/pages/functions/value-modifiers.mdx
@@ -139,6 +139,10 @@ This group of functions allows to modify the value of events.
 
 <JsDoc client:idle name="Pattern.range2" h={0} />
 
+## ratio
+
+<JsDoc client:idle name="Pattern.ratio" h={0} />
+
 # Custom Parameters
 
 You can also create your own parameters:
diff --git a/website/src/repl/Footer.jsx b/website/src/repl/Footer.jsx
index c31e167a..30e2f3a1 100644
--- a/website/src/repl/Footer.jsx
+++ b/website/src/repl/Footer.jsx
@@ -364,7 +364,8 @@ const fontFamilyOptions = {
 };
 
 function SettingsTab({ scheduler }) {
-  const { theme, keybindings, isLineNumbersDisplayed, fontSize, fontFamily } = useSettings();
+  const { theme, keybindings, isLineNumbersDisplayed, isAutoCompletionEnabled, fontSize, fontFamily } = useSettings();
+
   return (
     <div className="text-foreground p-4 space-y-4">
       {/* <FormItem label="Tempo">
@@ -406,7 +407,7 @@ function SettingsTab({ scheduler }) {
           />
         </FormItem>
       </div>
-      <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
+      <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
         <FormItem label="Keybindings">
           <ButtonGroup
             value={keybindings}
@@ -419,6 +420,11 @@ function SettingsTab({ scheduler }) {
           onChange={(cbEvent) => settingsMap.setKey('isLineNumbersDisplayed', cbEvent.target.checked)}
           value={isLineNumbersDisplayed}
         />
+        <Checkbox
+          label="Enable auto-completion"
+          onChange={(cbEvent) => settingsMap.setKey('isAutoCompletionEnabled', cbEvent.target.checked)}
+          value={isAutoCompletionEnabled}
+        />
       </div>
       <FormItem label="Reset Settings">
         <button
diff --git a/website/src/repl/Repl.jsx b/website/src/repl/Repl.jsx
index c30e7663..74102c91 100644
--- a/website/src/repl/Repl.jsx
+++ b/website/src/repl/Repl.jsx
@@ -105,7 +105,7 @@ export function Repl({ embedded = false }) {
   const [lastShared, setLastShared] = useState();
   const [pending, setPending] = useState(true);
 
-  const { theme, keybindings, fontSize, fontFamily, isLineNumbersDisplayed } = useSettings();
+  const { theme, keybindings, fontSize, fontFamily, isLineNumbersDisplayed, isAutoCompletionEnabled } = useSettings();
 
   const { code, setCode, scheduler, evaluate, activateCode, isDirty, activeCode, pattern, started, stop, error } =
     useStrudel({
@@ -272,6 +272,7 @@ export function Repl({ embedded = false }) {
             value={code}
             keybindings={keybindings}
             isLineNumbersDisplayed={isLineNumbersDisplayed}
+            isAutoCompletionEnabled={isAutoCompletionEnabled}
             fontSize={fontSize}
             fontFamily={fontFamily}
             onChange={handleChangeCode}
diff --git a/website/src/settings.mjs b/website/src/settings.mjs
index a6a5cc2d..2e42f746 100644
--- a/website/src/settings.mjs
+++ b/website/src/settings.mjs
@@ -5,6 +5,7 @@ export const defaultSettings = {
   activeFooter: 'intro',
   keybindings: 'codemirror',
   isLineNumbersDisplayed: true,
+  isAutoCompletionEnabled: false,
   theme: 'strudelTheme',
   fontFamily: 'monospace',
   fontSize: 18,
@@ -21,6 +22,7 @@ export function useSettings() {
     ...state,
     isZen: [true, 'true'].includes(state.isZen) ? true : false,
     isLineNumbersDisplayed: [true, 'true'].includes(state.isLineNumbersDisplayed) ? true : false,
+    isAutoCompletionEnabled: [true, 'true'].includes(state.isAutoCompletionEnabled) ? true : false,
     fontSize: Number(state.fontSize),
   };
 }