Hi Tamas,
I checked the mentioned form and, as this table is setted as TABLEROW and some of its cells are static, is not possible to change the column size in the layout or even though changing it directly in the XML file, cell by cell. I was trying it.
For example, choose the Cell6 of TABLEROW[0] and click on tab 'XML Source'. You will see this statement:
<draw colSpan="3" h="16.3166mm" name="Cell7" w="22.225mm">
You can try to change the value 'colSpan' according to your requirement.
This table size is not modifiable because it was developed to it.
I believe that Diego's suggestion can help in this case, if you are having problems to print the entire table on the page.
Regards,
Lucas Comassetto.