Probably for your [[Presentations|slides]], probably for some [[Animation|animation]] or for whatever reason you may want it: you can hide some content from the document, while leaving exactly the same amount of space as that content would need if typeset in the usual way.
== Overview ==
On the [[http://archive.contextgarden.net/thread/20050707.223338.a9169811.html mailing list]] Hans suggested many different ways (astonishing easy to use) to hide the content in a PDF document. Sadly, most of them are viewer-dependent.
<table style="border:1px solid #DDDDDD; width:100%" align="left" valign="top">
<tr style="background-color:#DDDDDD" align="left" valign="top"><th> method </th><th> principle </th><th> PROS </th><th> CONS </th></tr>
</td></tr>
</table>
x
== The plain TeX way ==