Hi Robert! To erase pictures on your ZTE Majesty, just go to the Gallery app. Once there, open the picture you would like to erase, do a long press on it and wait for a trash can icon to appear on the screen. When you see it, press it and confirm the pop-up that asks if you are sure you want to delete it.
If you want to delete multiple pictures, you can do a long press on one picture, and then quickly tap all of the pictures you would like to erase before hitting the trash can icon mentioned earlier.
Lastly, you may also delete entire albums by doing a long press on any picture album and then hitting the trash can icon that appears afterwards. Let us know if this advice works!