The Page Sizes section includes options that control the number of items written to a single web page. These options help manage the size of the generated HTML pages.
Smaller numbers mean more pages, whereas larger numbers mean longer pages. Short pages are desirable because they load quickly, but it can be difficult to manage a site with hundreds or thousands of pages. Long pages take more time to load than short pages, but it's easier to manage a site with fewer pages.
Each value involves a trade-off, and there is no single right answer, but it's usually best to use the default value unless you understand how the property affects the site. Even in that case, it's best to experiment. If you have a lot of data for most of the people in your database, or if you have a lot of pictures, you should probably set People per Page to a low number.
People per Page
People per Page controls the number of person entries written to a people page. The default is 25.
Surnames per Page
Surnames per Page controls the number of surnames entries written to a surname index page. The default is 600.
Names per Index Page
Names per Index Page controls the number of names written to an index page. The default is 400.
Name Index Reserve
Name Index Reserve controls the minimum number of name slots that must be available for GedSite to start a new surname on an index page. GedSite will not start a new surname on the current index page unless there are at least as many slots available as set by the Name Index Reserve property. The intent is to keep surnames with only a few names on one index page. The default is 20.
Sources per Page
Sources per Page controls the number of source entries written to a source page. The default is 250.