What am I doing wrong with the Dynamic Image

Where can that change? Sorry I’m really a beginner. Thank you for your patience with me. Greetings Walter

Dear community have found the error on this topic. The error was in the program. Had version build 788 installed and there the bug was fixed with the next version. Now I have in the description of build 710 ? read that the error has been fixed. Thank you very much for the many great ideas and advice. Walter