On Tue, 11 Jan 2011, Procházka Lukáš Ing. - Pontex s. r. o. wrote:
Or is there another (non-layering or layer-merging) way?
You can also crop the pdf (\clip[mp=shape that you want to
clip]{\externalfigure[...]}) and place that on paper using layers. That
way, even if layers are toggled on a pdfviewer, the reader will see blank
text (as opposed to old text).
But, I believe that clipping still inserts the whole pdf, so if someone
really wanted, they can still extract out the original pdf. So this is not
a failsafe way of hiding information; but is better than just adding a
layer over the title.
Aditya
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