matchParentSize

Size the element to match the size of the Box after all other content elements have been measured.

The element using this modifier does not take part in defining the size of the Box. Instead, it matches the size of the Box after all other children (not using matchParentSize() modifier) have been measured to obtain the Box's size. In contrast, a general-purpose Modifier.fillMaxSize modifier, which makes an element occupy all available space, will take part in defining the size of the Box. Consequently, using it for an element inside a Box will make the Box itself always fill the available space.