Those are the Global Origin 0,0,0 and the Local Origin. You can reset you local origin to be the same as the Global Origin, but a screen shot will always show them.
Rendering your 3D window will not include them.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"