Thank you to SouthwaterDave and abduraooft for your comments.
Yes I do intend to reduce the images and I do have the necessary software.
My main concern at the moment is - How many pictures per download and how to space them.
The program that I am using will automatically fill the screen at any normal setting. Are the pictures too close to each other. Should I put all the pictures on one menu, or should I have multiple menus?
Any feedback will be welcome.
is the URL.
Site still being developed. There are '100 plus' pictures to include.