The {{WikiProject Primates}} project banner template should be added (not subst:ed) to the talk page of every article within the scope of the project. While the template does not require any additional parameters, it has a number of optional ones that add various extra features to the banner. The full syntax is as follows:

{{WikiProject Primates
|class=  
|importance=
|attention=
|needs-photo= 
|needs-audio=
|collaboration-candidate=
|past-collaboration=
|peer-review= 
|old-peer-review=
|orphan= 
}}

General parameters:

• class – a rating of the article's quality; see the assessment department for more details.
• importance – a rating of the article's importance; see the assessment department for more details.
• attention – "yes" if the article requires immediate attention; this should be used sparingly.
• needs-photo – "yes" if the article could benefit from having a photograph but currently does not have one.
• needs-audio – "yes" if the article could benefit from having audio files but currently does not have any.
• collaboration-candidate – "yes" if the article is currently a candidate for project collaboration.
• past-collaboration – "yes" if the article was previously a project collaboration.
• peer-review – "yes" if the article is currently listed on the project's peer review department.
• old-peer-review – "yes" if the article was previously listed on the project's peer review department.
• orphan – "yes" if the article is not currently supported by the Primates WikiProject.

To avoid needlessly cluttering up talk pages, it is usually appropriate to remove any unused parameters from the template.