Expanding Long HTML attribute box in Web Interface

Hi

We have added a Long HTML attribute to a new tab on a work item. In the RTC client every is OK and the box for the attribute is the size of the tab!

When users try to add text to the field in the Web interface it is only showing 4 lines which is making it difficult for people to add information to the work item.

Is there some setting that can be used in the definition of this attribute that will allow you to set the size of the box in the web interface.

Thanks