No worries, I should have explained myself better. For your images, you've got your thumbnails scaled (e.g. 500px × 375px (scaled to 100px × 75px)) Use photoshop to resize and upload a smaller image to use as a thumbnail, that way people only have to load a 100px image instead of a shrunk 500px image.

For the scrolling, add two arrow buttons, one on the left and one on the right. However you are automatically advancing your list of images when you click an image on the right side, do the exact same when you click on the arrow button, except the image shouldn't change. I don't think this should be too hard to add in. (I hope )

For the currently open links to pages, presumably you have those links as separate html for each page? Or is it done with css? If you have html, just change the color of the Stills link on the https://eyellem.com/stills.html page...

Anyway, hope that gives you some ideas and keep up the awesome work!