There are a couple of builtin viewports, that each do different things. Here is a list of the names, and their descriptions:
| Viewport Name | Description |
|---|---|
| StretchViewport | Will stretch the screen. No black bars, but aspect ratio might be off. |
| FitViewport | Will maximize it's size based on the aspect ratio. Could have black bars. |
| FillViewport | Quite the same as a FitVieport, but always fills the entire screen. |
| ScreenViewport | Always fills the entire screen, but does not resize any children. |
| ExtendedViewport | Keeps the world aspect ratio without black bars by extending the world in one direction |
| CustomViewport | A custom programmed Viewport. Might have black bars, and might keep aspect ratio. |