What do I have to do to ensure that the full images get an SEO URL?
I have activated colorbox.

The full image URL:
<pre>[code]/zp-core/full-image.php?a=land-xyz/asdfghjk&i=PICT0023.JPG&q=75&wmk=%21&dsp=Protected%20view&check=a67bfe9d0c89713d651f13cff7a04d944812f233[/code]</pre>

in the source code:
<pre>[code][b][img]/cache/land-xyz/asdfghjk/PICT0023_600.jpg[/img][/b][/code]</pre>

That is the protected full image url. Disable the related option and you get the plain direct url to the albums folder place.

Puh, i have found it.

Options
Image
Full image protection:
Disable hotlinking
cache the full image
password:
Dropdown: Unprotected

But, I have probably changed something wrong, but do not know what. Now the resize images are with these protected URLs. Where do I put this?

Did you maybe enable "protected image cache"?

Options
Image
"Protect image cache": is uncheck

wohoo, eventually a time leg? chache? yet it works. Thanks!
...aah, browser cache, maybe.