Perform a search and prepare your print/email list as usual.
On the Print/Email page, your selected references will display in a row in the [Properties] text box. Select the pencil edit icon on one of the references.
A pop-up window will display all the property photos with a tick on each one.
Click any photos that you DO NOT want to use on your window cards, they will grey out. (Click again to re-select if you change your mind.)
The reference you have just edited will now have a grey background in your print list.
Your window cards will use the ticked photos in order from the top-left as displayed and will skip any that you have deselected.
If you have not selected enough photos for a multi-photo window card, the resulting window card will have blank spaces.
You cannot change the order of the photos.