There are three places to access your property photos:
Via the toolbar menu:
Via the display photos - by selecting the arrow over the photo, till you get to Manage Photos:
These options will take you to the Photo Manager Screen:
To carry out an action on a particular photo, select the photo once, so it becomes highlighted:
A number of options appear on the toolbar:
This moves the order of the photo. This will directly reflect on templates, property screen, your website and portal uploads.
Show or hide on website, want to keep the image, but it is not too good for the website. Hide the photo, and it will fade out and not be included in any published marketing.