Hi and sorry for late reply,
unfortunately this is not possible, I will take it as feature request. Now you can do this by adding following Javascript code to your template:

jQuery(document).ready(function(){

    if(jQuery('#jform_ALIASOFTHEFIELD').length) jQuery('#jform_ALIASOFTHEFIELD').chosen({ max_selected_options: 1 });

});

Replace ALIASOFTHEFIELD with the alias of your select field

Hi

Thank you for helping me.

I added the following code via Module to the Page:

<script type="text/javascript">

	jQuery(document).ready(function() {

		if (jQuery('#jform_allgemein').length) jQuery('#jform_allgemein').chosen({

			max_selected_options: 4

		});

	});

</script>

But it doesn't work ...

Regards
Christoph

Hi
Any other solution for this problem? It does not work with this Code.

Regards
Christoph

Hi,
unfortunately the access you provided me does not works, can you please to re-send it?

Hi,
try with this code:

<script type="text/javascript">

	jQuery(document).ready(function() {

		if (jQuery('#jform_allgemein').length) {

                     jQuery('#jform_allgemein').chosen('destroy');

                     jQuery('#jform_allgemein').chosen({

			max_selected_options: 4

		    });

                }

	});

</script>

Hi

It works with this Code. Perfect!

Thank you
Regards
Christoph