width of phtmlb:ganttChart

I just inserted a phtmlb:ganttChart into my WebAS application. Cool stuff.

Now, I wonder how to set the width of the chart.

In my case, the chart is inserted into a table, which has width="100%". If the time frame that is shown in the chart is too big to fit on my screen, then everything that does not fit on the screen is cut off and no scrollbars are shown. The same happens is the height of the chart gets too big for my screen (too many rows). Then, the rows at the bottom are cut off as well.