<!DOCTYPE html>
<html>
<body>
<h1>The select multiple attribute</h1>
<p>The multiple attribute specifies that multiple options can be selected at once:</p>
<form action="/action_page.php">
<label for="cars">Choose a car:</label>
<select name="cars" id="cars" multiple>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
<br><br>
<input type="submit" value="Submit">
</form>
<p>Hold down the Ctrl (windows) or Command (Mac) button to select multiple options.</p>
</body>
</html>