Can you change the size of a multi-select box on a form?

Can you change the size of a multi-select box on a form?

From within Zoho (and not an html view), can I increase the size of a multi-select box on a form? Right now it's only showing three items, and I'd like it to be deeper and show more if possible. Is there something I can do within the form definition to make it display more than three in the box?

Also, any way to make the box wider? (I'm guessing no without using an html view, but figured it was worth asking)

Thanks.