Yes that is correct the thumbnail image resizing happens when you upload an image using the product setup screen.

---

At your service,
Dave Smith

The thumb image height and width settings in the cart setup just set the size parameters the actual resizing happens in the product setup screen when you upload the image. The images you already have loaded will only have their sizes updated if you re upload them through the product setup screen.

---

At your service,
Dave Smith

1) Download the Image Resizer PowerToy from Microsoft for your flavor of Windows.

2) Go to Portals/(Portal #)/SmithCart/Thumbnails

3) CTRL-A to select all files

4) Right-click on a file, select "Resize Image"

I did 2900+ images this way, because I didn't want to upload them one at a time.