How Do you add another object to print?

I asked them how to add another print to a queue too print them both at the same time and I did what they told me to do but it did not work.
how do I print two objects at once because it is not working? And that would be a major time savor.
thanks for the help

 

Referencing the image below you will need to use the Add button that is at section #12 instead of the Add button at section 8

 

I did all of that I got both parts I wanted to print and put them both on the same grid generated it and saved it but it only prints one of them? That's why I am totally lost and your matter control screen their looks way different from mine but they took over my computer and downloaded it for me

 

I

I did that but it didn't work that's why I'm lost?

 

The software that came with the robo3D matter control

 

It sounds kind of weird... First load your first pat then view it in the model viewing window orient it the way you want, then click add and add the other model. Then click save and both models will be saved to the same print, to confirm click layer view and click generate now both models should show up in the layer generation. Both models should print now.