Specify image position

[vorpalvorpal]

I know that with fp_par() it is possible to specify padding, but as far as I can see it is not possible to specify position in relation to the page.

My particular use case is replacing a bookmarked image where the original image is positioned in front of text and relative to the bottom and right side of the page. The ability to specify this positioning for the replacement image is lacking as far as I can see. Instead the image is placed relative to the page's margin.