It is better to do this on the design surface (Visual Studio 2012 is shown but can be done in other versions) first before calculating any maths when editing an SSRS document.
Below the following numbers in red circles that map to these following steps:
- In the design surface, sometimes the editor will create a
pagewhich is larger than the actual controls; hence the ghost area being printed. - Resize to the controls. Visually look at the width/height and see if you can't bring in the page on the design surface to size it to the space actually needed by the controls and no more.
- Then try to create a PDF and see if that fixes it.
- If #3 does not resolve the issue, then there are controls requiring too much of the actual page size and going over in either length/width. So one will need to make the size of the controls smaller to accommodate a smaller page size.
Also in some circumstances one can just change a property of the report page by setting ConsumeContainerWhitespace to true to automatically consume the spaces.