To use the Ps template add
{{ps|#}}
To the "Notes" section of the Header template. # should be replaced with the number of times the page has been proofread. Eg {{ps|1}} to indicate the page has been proofread once. This template will categorize pages based on their proofreading status, and also based on their source publication. See for example Category:Pages proofread once or Category:List of text pages per publication.
