How to display subcategories images

Hello,

When I diplay a category, the attached image appears, but the images that belong to the subcategories does'nt appear. (see attached file)
Is there a way to do that?
What is the file which need to be modified?

Thanks for your help.

osproperty.v.3.12.9

Hi Bootster,
Unfortunately, OS Property doesn't have feature to show pictures of sub-categories
Thanks
Dam