Image confusion.

I am confused about the images and their names used in Opencart. I know there is a place to edit image sizes in the admin panel under settings, but I have no idea what these refer to. Meaning, I don't know what images Category Image Size, Product Image Thumb Size, Product Image Popup Size, etc... actually refer to and whenever I make a change to any that I think are the ones I want to change, nothing happens.

For instance, I'd like the image here to be larger: http://www.rosiesyarncellar.com/shopros ... duct_id=50

As well as the images here http://www.rosiesyarncellar.com/shopros ... duct_id=52

Is there anywhere that lists what the image names refer to? Or can anyone help me out? I know this is kind of silly but it's so frustrating!

Thanks so much!

Okay, a few things.

For the "Silk Blend" page, you have uploaded your images in the additional images tab. That's great if you have multiple images of one product, but you haven't uploaded the "main" image for it yet. Go back to Catalog > Product > Silk Blend and under the Data tab, you will see an image that looks like a camera. Upload your main product image there. Then any additional images go under the image tab.

The Category Image Size is the size of the image when you are on a category page. Product Image Popup Size is the lightbox effect that opens the product image to a bigger size. Product Image Thumb Size is the size of the product image on the product page.

You can change the sizes of these images in System > Settings > Image tab.