Before you begin, make sure the photos are downloaded and saved to a location on your local hard drive. Matrix cannot load photos that are inside of an email or a web-based/cloud location- they need to be saved locally in order for Matrix to access them.
Go to the Add/Edit tab, select the appropriate listing and click Manage Photos.
Click the Browse button to search your hard drive for the photos you want.
To select more than one photo, hold down the CTRL key on your keyboard while you click the files you want. Click Open when you are done and it will bring the selected photos back into the Manage Photos screen for you.
Click Save when you are done.
There is a limit of 40 photos per listing. Photos have to be in jpg format and no larger than 20mb per photo.
iPhone photos are not recommended, as there is a known issue where they become rotated when viewed on Apple devices.