[oXygen-user] Dragging PDF images into a DITA topic: use image element instead of xref?

Hi group I have my images (vector graphics) in PDF format. When I select an image in Windows Explorer and drag it into a DITA topic, I see that an xref to this pdf file is created, as shown in the example below: <xref href="Graphics/ce.pdf" format="pdf"/> Instead, I want to have an image element like this: <image href="Graphics/ce.pdf" id="image_b3d_gwd_nfb"/> This is oXygen's behaviour when I drag other graphic file formats (for example EPS, JPG, PNG) into my editor. Is there also a way to do this with images in PDF format? Thanks Yves