Alignment

All grid layout composables have a content lambda parameter. In this content, items can have the align modifier.

The align modifier set the item composable's alignment in the cell. align takes an Alignment likes BoxScope's one. For example, you can set an item composable at the bottom-center of the cell with following code:

HorizontalGrid(
    modifier = Modifier.fillMaxSize(),
    rows = SimpleGridCells.Fixed(3)
) {
    Item(Modifier.size(100.dp))

    Item(
        modifier = Modifier
            .size(50.dp)
            .align(Alignment.BottomCenter)
    )

    Item(Modifier.size(100.dp))
}

BoxGrid(
    modifier = Modifier.fillMaxSize(),
    rows = SimpleGridCells.Fixed(3),
    columns = SimpleGridCells.Fixed(3)
) {
    Item(Modifier.size(100.dp))

    Item(
        modifier = Modifier
            .row(1)
            .size(50.dp)
            .align(Alignment.BottomCenter)
    )

    Item(
        modifier = Modifier
            .row(2)
            .size(100.dp)
    )
}