What version of Premiere Elements are you using and on what computer operating system is it running?
In the absence of that information, I will generalize.
1. You right click a copy of the Timeline file with the video and audio linked and then select Delete Video from the pop up.
2. Then you drag your Still Image to the Timeline and align it with your audio file.
You can leave that still audio positioning as is or "Group" the two so that they move together (if you want to move them together).
For that, select/highlight the still and audio portions (hold down Shift and click video portion and then audio portion), right click in the selection, and select Clip Menu/Group from the pop up.
Please let us know if that generalized answer works for you. If not, more details please.
vielen Dank für Ihre Antwort.
Auch wenn sie nur allgemein gehalten war, hat sie mir doch bei meinem Problem geholfen. Hat dann alles wunderbar funktioniert.
Great news of your success.
Thank you for the follow up which is appreciated by all.
Please do not hesitate to ask questions or to ask for clarification. We are glad for the opportunity
to help you move forward in your Premiere Elements projects.