Hi Joffm,

Thanks, my problem is that the code you showed above does not appear in the example you sent as such (see picture).

If I edit this code based on your example in your last answer (see below) - no pictures are shown. (My pictures are called picture_01, picture_02, etc.).

Also something that I don't understand. If I save the code shown below in the question, no pictures are shown. The next time I open this question, the links to my pictures are gone and I only see the code shown in the picture.

Thank you in advance and best,
Katharina 

<table class="table" width="100%">
    <tbody>
        <tr>
            <td>
            <div class="container text-center">
            <div class="row">
            <div class="col"> </div>

  <div class="col">
  <img style="width:30%"; src=" katharinafietz.limesurvey.net/upload/surveys/ xx/images/picture_{substr(QPool_1,0,2)}.jpg"/>
  <img style="width:30%"; src=" katharinafietz.limesurvey.net/upload/surveys/ xx/images/picture_{substr(QPool_1,0,2)}.jpg"/>
  <img style="width:30%"; src=" katharinafietz.limesurvey.net/upload/surveys/ xx/images/picture_{substr(QPool_1,0,2)}.jpg"/>
  </div> 

            <div class="col"> </div>
            </div>

            <div class="row">
            <div class="col"> </div>

  <div class="col">
(hier I inserted the same link structure as above)
  </div> 

            <div class="col"> </div>
            </div>
            </div>
            </td>
        </tr>
    </tbody>
</table>