How many photos in the theme window

Which theme are you using? And what “window” are you referring to, the home page? You should post on the support forum for the theme that you are using. If you use a static page for your home page, you should be able to add as many images as you like. Just keep in mind that the more images that you have, the slower your page will load. Images generally take the most amount of data on a web page, so make your images just big enough for your needs. Your visitors will not be returning to your site very often if it takes too long to load.

Thank you! I am new at this. What is a static page and what is the other?
I have a book written by me and I want to give it away chapter by chapter.I suppose that is a static page!?

Which theme are you using?

Your choice for the home page is either a static page, which never changes, or a blog page, which displays a list of excerpts from posts that you create, in decreasing order by date. Judging by what you want to do, I would suggest using a blog page for your home page, which is the default setting for WordPress. Then you could create a post for each chapter every so often, and the excerpt for the latest chapter would appear at the top of your home page.

For example, you might create a post for your first chapter, then wait a few days, then create a post for your second chapter, and your home page would show excerpts from both chapters on it, with the second chapter’s excerpt at the top. If your visitors were interested in reading the full chapter, they would click on the title for that post and be taken to a new page where they could read it.

To figure out what theme you are using, go to Appearance > Themes from your admin dashboard, and the name of your theme should be at the top.

Thankyou very much! Your info in just what I needed!

The book is kalled Mzungu and is about my life in East Africa 1940-50 and growing up in that enviroment not long after Livingstone!
Thank you again.