You can add room overview photos within the 'Report Editor'

From the dashboard  select 'Jobs' 

Select your Job from the list and from the Job Details screen select 'Report Editor' from the tabs at the top of the screen.

In the 'Report Editor' select 'Rooms' from the left hand side of the screen.

Click on the selected room right hand side of the screen

At the top is an icon 'Add Media'  

Select this icon and select 'browse' on screen and select a photo from your device to upload. 

After selecting your photos click 'Next ' at the bottom of the screen