Alignment

All grid layout composables have a contentAlignment parameter. This parameter sets the default alignment of all items within their grid cells.

VerticalGrid(
    columns = SimpleGridCells.Fixed(3),
    contentAlignment = Alignment.Center
) {
    // These items will be centered in their cells by default.
    Item()
    Item()
}

In the content lambda, each items can also have the align modifier to override the default alignment.

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)
    )
}