If you are writing text and you are using words which are defined in Glossary module, these words are converted automatically to links to glossary.

In the following an example: avatar

Using the macro capability in OPN you can also define a link to wikipedia:

[ wiki=OpenPHPnuke;en ] or in a different language:
[ wiki=OpenPHPNuke ;de ]

[wiki=OpenPHPnuke;en] in english wikipedia
[wiki=OpenPHPNuke ;de] in german wikipedia

To activate this feature use the following setting:
1. Admin Settings Misc : Use OPN expert mode Yes
2. Admin Settings Macro: Switch the appropriate macro to Yes
3. Admin Settings Macromodule: Switch the appropriate modules to Yes.