Preview at most this many edits from the top of the page's history.
popupCategoryMembers
true, false
Whether or not to preview members of categories. If simplePopups is set to true, then the default value for this option is false.
popupPreviewDiffs
true, false
Show previews for diff links. If simplePopups is set to true, then the default value for this option is false.
popupPreviewHistory
true, false
Whether or not to generate special previews for links to history pages. If simplePopups is set to true, then the default value for this option is false.
popupContribsPreviewLimit
25, an integer
Preview at most this many user contributions.
popupPreviewKillTemplates
true, false
If true, templates referred to in an article are simply deleted from previews; otherwise, they're shown as raw wikitext.
popupPreviewRawTemplates
true, false
If true, template pages (that is, pages in the Template: namespace) are previewed entirely as raw wikitext; otherwise, an attempt is made to render them in the preview.
popupPreviewFirstParOnly
true, false
If true, previews are restricted to the first paragraph of the article.
popupMaxPreviewSentences
5, an integer
The maximum number of sentences to extract from something approximating the beginning of an article for the preview.
popupMaxPreviewCharacters
600, an integer
The maximum number of characters to extract from something approximating the beginning of an article for the preview.