Neue Benutzeroberfläche anpassen

Hi @Andreas Ross 

Thanks for reaching out. 

In modern viewers, the bookmark has been repositioned to the right-hand side panel. To know more about new UI and changes, please refer to this help article- https://helpx.adobe.com/acrobat/using/new-acrobat-experience.html 

In the new UI, you can't get it or customize it to the left. However, you can switch back to the old UI by following these steps- 

• Click on the hamburger icon in the upper left corner.
• Click on Disable New Acrobat

Note- we recommend using Acrobat's modern viewer, as going forward disabling a new UI feature will not be available. 

You can share your feedback about new  Modern viewers here: https://www.adobe.com/products/wishform.html 

Thanks,

Akanchha