how can i make a powerpoint slide placed into mural editable

It is great that I can place a powerpoint slide into mural. But I want to be able to edit the boxes, text that are in the powerpoint slide. I can do this with copying and pasting something from Illustrator, but it seems when I place something I have copied from powerpoint into mural it keeps it as a locked selection versus letting me have an editable image. I have tried also exporting from powerpoint to mural, but it is doing the same thing. It is just placing the slide into mural with no ability to edit the content