Margin and Padding Pitfalls
The XF Designer and the drofus reportserver use different software to generate the reports. Unfortunately it sometimes causes reports exported from XF Designer to look different than it does in XF Designer. This is only a problem when assigning margins and/or paddings to blocks and table cells.
top-margin for blocks - Margins don't appear in XF Designer but will appear in reports generated on the drofus reportserver.
margin and padding for table cells – it's best to avoid assigning margins and padding to table cells since they seem to be supported quite differently.