Wiki.nus runs on Confluence, a product of Atlassian. This is Atlassian's guide for Confluence.
The link above is the guide for Server 6.11.
To ensure you have the correct guide version, refer to this wiki's footer to view the current server version.
If it is not 6.11, choose the documentation for the respective Server version number.
Please note that Atlassian's guide is not specific to NUS. There may be features that have been added/removed from the default installation.
Access the Wiki.nus User Guide (NUS) for NUS-specific instructions.