The metamodel editor lets you edit the metamodel that is in use for your active workspace. Here we'll go through a couple of ways to approach this.

There are two ways to access the metamodel editor:

Right-click on the workspace name in the navigator, then select “Edit metamodel”:
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Select “Manage component types” from the dropdown menu:
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Add another top-level component type by clicking "+ Add component type". You can also add a child component type by clicking a (+) button in the hierarchy.

Change the look of your components on the right side:
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When you are finished, Click save and then just exit by clicking on "Back to workspace", and everything is saved.

If you still have questions or need more information, reach out to us via our website or by using the in-app chat.