1)     Open 123D Catch

2)     Tap the hamburger menu in the upper left corner

3)     Sign in as a user

4)     Select ‘home’ on the top left side of the screen

5)     Select ‘Captures’ on the left side navigation bar

6)     Select a 3D model to be published with gray background

7)     Tap the edit icon

8)     Select ‘Next’ in the bottom right corner of the screen

9)     Modify the 3D model in the frame, and tap ‘Next’ at the center bottom of the screen

10)     Activate the switch button named ‘Share’

11)     Add the name, a description and a tag. And then tap ‘Share’ at the center bottom of the screen