Sounds like a CSS issue, so before this question gets flagged, hopefully this will help you out.

The most efficient way, assuming it *is* a CSS issue, is to add a stylesheet to your theme whose `media` type is `print` (see below for example).

Assuming the part you want to hide is an element (`div`, `span`, etc) whose class is `mycustomclass`, inside that stylesheet you could add something like this:

    .mycustomclass {
      display: none;
      visibility: hidden;
    }

And here's the example mentioned above:

    <link type="text/css" rel="stylesheet" href="http://www.example.com/sites/all/themes/mytheme/print.css" media="print" />

HTH...

:)