I have folios on the website that have larger images and then a thumbnail that users click on to bring up the larger image. In order to have it all work properly I-
1. go to pages
2. add new
3. name page
4. add to parent and order
6. under custom field -name – I pick the image size I want it to be.
7. Meanwhile from media I upload the appropriate image and copy the file url
8. I paste the url into value
9.I then hit add new custom filed and add the smaller image the same way.
I tried what you say but it does not seem to work. I am not sure if the person who set this up for me hacked wordpress to do what I need.
I have been doing what I explained above all along and it has worked fine until today.