To edit your objects go to the Settings-panel by clicking on Settings in the menu to the left. 

In the menu to the left in Settings choose Dynamic Field and Object 👇
Here you can add your own dynamic fields.  
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The same applies to when you want to add Categories 👇
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Here we have some categories to choose from and you can add your own too. For example Model groups, Contract types and Contract Status.
Just click + Add new up in the right corner to get started 🚀 

In the clip below you can see how you then work with the information to the object to make them more specific and make it easier to work with the data.