Hi Yanay
Unfortunately I can’t manage to get it work with rows. If I dock them to differnt rows with %, they still overlap when I resize the screen to a bigger size. If you can show me how to get it done with docking the images to different rows so they resize proportionally, this would be great! If not, no worries, I’ll figure it out somehow. 
Many thanks anyways for your help!
Best,
Nadine