Max Height

If the code doesn't fit into one slide, you use the maxHeight to set a fixed height and enable scrolling:

```ts {2|3|7|12}{maxHeight:'100px'}
function add(
  a: Ref<number> | number,
  b: Ref<number> | number
) {
  return computed(() => unref(a) + unref(b))
}
/// ...as many lines as you want
const c = add(1, 2)
```

Note that you can use {*} as a placeholder of ✨ Line Highlighting:

```ts {*}{maxHeight:'100px'}
// ...
```