Check out the section for customizing your Anytype.
Select your default object type and you'll the option to choose from any of the default types, types you've created, or create a new type.
This defines the type of object that opens up when you create a new object (hitting the plus sign).
Just below you have the choice to select your spellcheck language. This is helpful if you're writing in a specific language.
If you've been writing and haven't seen spellcheck, this may be why.
This is for the dark mode users out there.
Set your color mode; light, dark, or system.
Toggle automatically showing the side bar or not.