<!DOCTYPE html>
<html>
<body>
<h2>Allow Multiple Selections</h2>
<p>Use the multiple attribute to allow the user to select more than one value.</p>
<form action="/action_page.php">
<label for="cars">Choose a car:</label>
<select id="cars" name="cars" size="4" multiple>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="fiat">Fiat</option>
<option value="audi">Audi</option>
</select><br><br>
<input type="submit">
</form>
<p>Hold down the Ctrl (windows) / Command (Mac) button to select multiple options.</p>
</body>
</html>