Matte feature for Photos in OS X El Capitan
In iPhotos, I was able to use BorderFX to create mattes around photos I printed myself. Now that I have finally upgraded to 10.11.6, I no longer have that feature. My previous question was answered by referencing FX Photo Studio, etc. Those apps have frames for photos, not mattes. I am still searching for a fix for El Capitan Photos, or an app that will create mattes around my photographs. Here is an example of 3 BorderFX mattes [black to dark blue to light blue] on a photograph to give you an idea of what I mean:
OS X El Capitan (10.11.6)