Applicable XR devices This guidance helps you build experiences for these types of XR devices. [Learn about XR device types →](https://developer.android.com/develop/xr/devices.md.txt)  Display Glasses [](https://developer.android.com/develop/xr/devices.md.txt#audio-display) [Learn about XR device types →](https://developer.android.com/develop/xr/devices.md.txt)
In Jetpack Compose Glimmer, the [`GlimmerLazyColumn`](https://developer.android.com/reference/kotlin/androidx/xr/glimmer/list/GlimmerLazyColumn.composable.md.txt) works similarly to a
Compose [`LazyColumn`](https://developer.android.com/reference/kotlin/androidx/compose/foundation/lazy/LazyColumn.composable.md.txt) by only composing and laying out visible items to
maintain high performance. However, Glimmer lazy columns are built for
display glasses controls, where the user interacts using a touchpad rather
than a touchscreen. While a mobile user can tap any coordinate on a screen
at any time, a user with display glasses can interact only with the item
that holds focus.
 **Figure 1.** An example of some different styles of lists in Jetpack Compose Glimmer.
## Focus behavior and child items
Glimmer lazy columns automatically handle focus-based navigation. Unlike
lists for mobile devices where focus and scroll are often
separate, a Glimmer lazy column coordinates the two by moving focus through
its child items as the user scrolls with the touchpad. The list itself isn't
focusable, so it manages and requests focus for its children so that the user
has a clear point of interaction while scrolling.
Because there's no direct touch input, make all child items inside a Glimmer
lazy column focusable. When items have focus, also provide a visual
response, such as an active border or highlight. While users can still scroll
past non-focusable items, they can't interact with them. Use built-in components
like [`ListItem`](https://developer.android.com/reference/kotlin/androidx/xr/glimmer/ListItem.composable.md.txt) or [`Card`](https://developer.android.com/reference/kotlin/androidx/xr/glimmer/Card.composable.md.txt) whenever possible, as
these components are already focusable and provide visual feedback for focus
states.
## Example: Glimmer lazy columns with multiple items
The following code shows how to use a Glimmer lazy column with item and items
DSL methods to create a list of items:
```kotlin
@Composable
fun GlimmerLazyColumnSample() {
GlimmerLazyColumn {
item { ListItem { Text("Header") } }
items(count = 10) { index -> ListItem { Text("Item-$index") } }
item { ListItem { Text("Footer") } }
}
}
```
> [!CAUTION]
> **Caution:** For display glasses, don't use the Compose [`LazyColumn`](https://developer.android.com/reference/kotlin/androidx/compose/foundation/lazy/LazyColumn.composable.md.txt) except in rare cases where scrolling is managed entirely programmatically.
## Example: Glimmer lazy columns with a title slot
Jetpack Compose Glimmer also provides an overload of `GlimmerLazyColumn` that
contains a title slot. The non-focusable title, typically a [`TitleChip`](https://developer.android.com/reference/kotlin/androidx/xr/glimmer/TitleChip.composable.md.txt),
remains static at the top center while the list content scrolls underneath it.
The following code creates a Glimmer lazy column with a title slot:
```kotlin
@Composable
fun GlimmerLazyColumnWithTitleChipSample() {
val ingredientItems =
listOf("Milk", "Flour", "Egg", "Salt", "Apples", "Butter", "Vanilla", "Sugar", "Cinnamon")
GlimmerLazyColumn(title = { TitleChip { Text("Ingredients") } }) {
items(ingredientItems) { text -> ListItem { Text(text) } }
}
}
```
## Use Glimmer lazy list state for programmatic list operations
To control and observe different aspects of the list's state, such as its
scroll position using the [`firstVisibleItemIndex`](https://developer.android.com/reference/kotlin/androidx/xr/glimmer/list/GlimmerLazyListState.md.txt#firstVisibleItemIndex()) and
[`firstVisibleItemScrollOffset`](https://developer.android.com/reference/kotlin/androidx/xr/glimmer/list/GlimmerLazyListState.md.txt#firstVisibleItemScrollOffset()) properties, use
[`GlimmerLazyListState`](https://developer.android.com/reference/kotlin/androidx/xr/glimmer/list/GlimmerLazyListState.md.txt).
You can [hoist this state](https://developer.android.com/develop/ui/compose/state-hoisting.md.txt) using [`rememberGlimmerLazyListState`](https://developer.android.com/reference/kotlin/androidx/xr/glimmer/list/rememberGlimmerLazyListState.composable.md.txt) to
programmatically scroll using [`scrollToItem`](https://developer.android.com/reference/kotlin/androidx/xr/glimmer/list/GlimmerLazyListState.md.txt#scrollToItem(kotlin.Int,kotlin.Int)) and
[`animateScrollToItem`](https://developer.android.com/reference/kotlin/androidx/xr/glimmer/list/GlimmerLazyListState.md.txt#animateScrollToItem(kotlin.Int,kotlin.Int)).