Can a file attachment image thumbnail appear in a report?

yes, it look like my posted answer was missing the <a href part at the beginning.

Here is one that works. I see that when I pasted it in, this forum lost some of my formula. Note that you will need to remove the extra spaces in the h r e f and the and w w w

If you don't want a new window, then you leave out the target = blank.

"<a h r e f=\"h t t ps://mycompany.quickbase.com/up/" & Dbid () & "/a/r" &
[Record ID#] & "/e6/v0\"height=\"1000\" width=\"1250\" target=_blank/> " &
"<img src=\"h t t p s://mycompany.quickbase.com/up/" & Dbid () & "/a/r" &
[Record ID#] & "/e6/v0\" height=\"300\" width=\"375\" target=_blank />"

Also since I made that formula I now realize that you should just specify a width or a height (but not both), and it will automatically scale the missing one. If you specify both, then it forces an aspect ratio distort the original photo.