The default settings, that determine how the program distributes information between web pages, should be suitable for most users. But if required, they can be changed by clicking on the "Edit display style" item of the "Tools" menu, and going to the "File parameters" section.
If you would also like to save these changes for future use, you can do so in two different ways. click on "Save tag information as default" in the "Tools" menu.
Most of these parameters influence the size of the files produced, and therefore also how many files there will be. Please bear in mind that reducing the sizes of files may reduce download times to some extent, but will also increase the number of files downloaded by your visitors, the number of files you will have to upload to the web server, and the total web space you will need.
The indexes are organised into pages containing links to individuals, families and other records from the GEDCOM file, and on a higher level into index sections containing links to the index pages. The main index page contains links to these index sections.
In the dialogue box, in the panel labelled "Basic", you can specify how many entries appear on each index page, and the total number of the higher-level index sections. Obviously, the number of entries per index page shouldn't be too high, as this would result in very large web pages. On the other hand, if the database is fairly small, it may be possible to remove the need for the higher-level index sections altogether, by moderately increasing both these parameters.
You can also choose how the index entries should be split between the index pages. Taking the index by surname as an example, generally surnames with large numbers of entries will be split between several index pages. By default the splits will occur only at points when the first given name changes, and the title of each index page will specify the surname and the range of given names covered (for example, Smith, Adam - Smith, Harry). Using the "Basic" panel, you can alternatively choose to allow splits elsewhere, in which case the ranges will simply be numbered (for example, Smith (4)). Or you can choose not to allow surname ranges to be split at all.
You can also specify a guideline for the size (in kB) of the main sequence of HTML files that contain the textual data. Lowering this value will make the files smaller, but increase the total number of files and the total disc space required. This value can be changed only during the original creation of the web pages from a GEDCOM file, not when updating an existing set of web pages.