You can create new model containers directly in your project tab. For that, follow the following steps:
Open the project tab and navigate over to the + box
Hover over the left side of the box
Click on the greyed-out option where it says Model
A new model window will pop up where you will be required to provide the following information:
Model name (127 Character Limit)
Model Units
Model Code (optional field & alpha-numerical values only)
Model Type
Press the Save button
