Table not displaying properly with showPrintPreview

[mj.vanzelst]

Hi all,

Can anyone help me with a showPrintPreview() problem. A table is displayed in a HTML_area of a form .
This is because I do not know in advance how many columns the table will have. In the browser, the chart looks good.
In the PDF (showPrintPreview()) the table is displayed larger, which blanks out a part of the table.
Attached an example of the table in the browser, and an example of the table in the PDF.
Does anyone have an idea why this happens and how it can be resolved?
Thank you.