diff --git a/frontend/src/components/Header.js b/frontend/src/components/Header.js
index 1081735..6fa632c 100644
--- a/frontend/src/components/Header.js
+++ b/frontend/src/components/Header.js
@@ -1,17 +1,24 @@
-import React from 'react';
+import React, { useState } from 'react';
 import { Page, Text, User, Button, Spacer } from '@geist-ui/core';
-import { Settings } from '@geist-ui/icons';
+import { Settings as SettingsIcon } from '@geist-ui/icons';
+import Settings from './Settings';
 
 const Header = () => {
+  const [settingsVisible, setSettingsVisible] = useState(false);
+
+  const openSettings = () => setSettingsVisible(true);
+  const closeSettings = () => setSettingsVisible(false);
+
   return (
     <Page.Header className="custom-navbar">
       <Text b>NovaMD</Text>
       <Spacer w={1} />
       <User src="https://via.placeholder.com/40" name="User" />
       <Spacer w={0.5} />
-      <Button auto icon={<Settings />} />
+      <Button auto icon={<SettingsIcon />} onClick={openSettings} />
+      <Settings visible={settingsVisible} onClose={closeSettings} />
     </Page.Header>
   );
 };
 
-export default Header;
+export default Header;
\ No newline at end of file
diff --git a/frontend/src/components/Settings.js b/frontend/src/components/Settings.js
new file mode 100644
index 0000000..0d3da66
--- /dev/null
+++ b/frontend/src/components/Settings.js
@@ -0,0 +1,52 @@
+import React, { useState } from 'react';
+import { Modal, Input, Toggle, Select, Spacer, Button } from '@geist-ui/core';
+
+const Settings = ({ visible, onClose }) => {
+  const [theme, setTheme] = useState('light');
+  const [fontSize, setFontSize] = useState('14');
+  const [autoSave, setAutoSave] = useState(false);
+
+  const handleSubmit = () => {
+    const settings = {
+      theme,
+      fontSize,
+      autoSave,
+    };
+    console.log('Settings to be sent to backend:', settings);
+    // TODO: Implement API call to send settings to backend
+    onClose();
+  };
+
+  return (
+    <Modal visible={visible} onClose={onClose}>
+      <Modal.Title>Settings</Modal.Title>
+      <Modal.Content>
+        <Select 
+          label="Theme" 
+          value={theme} 
+          onChange={(val) => setTheme(val)}
+        >
+          <Select.Option value="light">Light</Select.Option>
+          <Select.Option value="dark">Dark</Select.Option>
+        </Select>
+        <Spacer h={0.5} />
+        <Input 
+          label="Font Size" 
+          value={fontSize} 
+          onChange={(e) => setFontSize(e.target.value)} 
+        />
+        <Spacer h={0.5} />
+        <Toggle 
+          checked={autoSave}
+          onChange={(e) => setAutoSave(e.target.checked)}
+        >
+          Auto Save
+        </Toggle>
+      </Modal.Content>
+      <Modal.Action passive onClick={onClose}>Cancel</Modal.Action>
+      <Modal.Action onClick={handleSubmit}>Submit</Modal.Action>
+    </Modal>
+  );
+};
+
+export default Settings;
\ No newline at end of file