page3
First image: it's smaller than the page. Selecting both, image and shape and performing Right click → Shapes → combine(1st Form function) you'll obtain the substract result. 5.3.6.1
Second image: it's the same than before, but it was enlarged
Now, selecting both, enlarged image and shape and doing Right click → Shapes →combine(1st Form function) you'll obtain the substract result. 5.3.6.1
Third image: originally larger than the page. Selecting both, picture and shape and doing Right click → Shapes → combine(1st Form function) you'll obtain the substract result. 5.3.6.1 ok combine (1st Form function, german Kombinieren)