“Why would you want to hide content in an OpenOffice.org Writer
document? The most common reason is to maintain two similar
versions of a document within the same file. For instance, if you
are a teacher preparing an exam, you might want to use the same
file to print a version of the exam to distribute to students, and
another one, complete with answers, to give to markers. If
necessary, you can view the complete document on the screen, but
when printing or sharing files, you can hide or reveal content
depending on what you want each audience to see. By using Writer’s
hide functions, you no longer need to worry about multiple versions
of a document remaining in sync…”