1. On Flow board create a topic that has a link to an image, e.g. [[File:Icosahedron_grey.png|frameless]]
2. Upon saving, the topic will be displayed as a link, but only the part after a pipe symbol will be displayed:

If a link to a file is used without any additional attributes, i.e. without any option following the pipe, the link is displayed as a link.
The same title will be displayed, of course, in the Notification panel and Special:Notifications