I am extending multiple themes and it doesn't look like the app is using the correct theme. What do?

Take care in the order that you are using extends.

How can I make a specific UI component stand out in a view?

You can either add styles to the component in the view or if you want to do this for multiple components, you can create a new custom theme and reference the theme on the specific UI components.

Which UI components and attributes can be customized?

Utilize OXIDE's auto-completion inside the config.json file for a list of customizable UI components and attributes.
Example: a list of customizable UI attributes:
Example: a list of customizable attributes for object-table:

I want to configure a specific attribute on a UI component, but it doesn't seem to be available. What do I do?

Please let us know what you'd like to do on by submitting an idea.