Once I have seen something really nice here.
There was a photo and added as notices were the links to other similar or connected photos (PiP - Picture in Picture).
So if you "mouse-over" the photo you can automatically see the attached photos, too.
 

I would love to do something like that to one of my photos to link some enlargments to details.

Can anyone help me how to do that?
Just writing the HTML-Code into the notice didn't work ...
 

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Thanks to Roberto and Reinhard for their help.
All I needed to do is adding a word or character out of the HTML-code ...

Here is the result: www.ipernity.com/doc/dominikherz/2044367