We recommend that you have a short look at an existing content-type so you get the general idea...
Click save and do something funny
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Another step...
This is another core step, but without an image.
A description
This is how you can go ahead and create your own content types
It's always a good idea to create a test-item and see if the dialog does what you expect it to. Here's how:
Now that you created your content type, you will want to use it for something. This is what you will typically do next: