single_index_page
Normally, makethumbs will create multiple index pages if you have a lot of images. The alternative is to have a single index page with all of your images. When your directory has many images, this can get unwieldy and hard for people to navigate. It's up to you.
single_index_page
is a boolean variable; set it to
1 to make makethumbs create
only a single index page.