You can avoid page breaks by using the corresponding CSS properties. The property "page-break-inside: avoid;" will avoid page breaks within an element, if possible. Conversely, the properties "page-break-before: avoid;" and "page-breaks-after: avoid;" will avoid page breaks before respectively after the elements they are specified for. In this example, no page break will be inserted after a table:

table { page-break-after: avoid }

For more information, please see the chapter Page Breaks in the PDFreactor manual.