MIME-Based Transformations - Mastering phpMyAdmin 2.11 for Effective MySQL Management - page 240

A second transformation option is available for setting a title. This would be
displayed in Browse mode instead of the URL contents, but a click would
nonetheless bring us to the intended URL.
If we use only the second transformation option, we have to put quotes
where the first option is to be entered, as follows: '','this is
the title' .
text/plain: imagelink
This transformation is similar to the previous one, except that we place in the cell
a URL that points to an image. This image will be fetched and displayed in the cell
along with the link text. The image could be anywhere on the Web, including our
local server.
The first available option is the common URL prefix (like the one for text/plain: link ),
the second option is the width of the image in pixels (default: 100), and the third is
the height (default: 50).
If the text for the link is too long, the transformation does not occur. In this case,
we can click the Full Texts icon to reveal the complete link. Then, we'll see the
image altogether.