H [USER=147152]@derekc[/USER]
Here is another way of using guides.
The total height of your paper is 15cm, yet the cutout is 13.7 cm. That means you need an edge of .65 cm from top and bottom
The total width of your paper is 10 cm, yet the cutout is 8.8cm, so you need an edge of .6 cm on the left and right
With rulers turned on and set to cm, zoom in to the upper left corner of your image and drag from the ruler, and a guide will be pulled out, and it will show the exact positioning in cm near your cursor.
Pull from the top ruler to make the guides at the top and bottom.
You would get an overall image with guides that look similar to the following image.
[ATTACH=full]148363[/ATTACH]
Place your image on a layer above the white background, and adjust your image size to cover at least the area of the guides.
Note that another way to give you flexibility is to select the white area outside your picture and use the Edit > Generative Fill command to fill in those areas so the positioning of the image so the positioning of your image is much more flexible.
John Wheeler
