For some properties, like flex factor, flex fit, and alignment,
you can modify the value via dropdown lists in the explorer.
When modifying a widget property, you see the new value reflected
not only in the Layout Explorer, but also on the
device running your Flutter app. The explorer animates
on property changes so that the effect of the change is clear.
Widget property changes made from the layout explorer don’t
modify your source code and are reverted on hot reload.

Interactive Properties

mainAxisAlignment,

crossAxisAlignment, and

FlexParentData.flex.
In the future, we may add support for additional properties
such as

mainAxisSize,

textDirection, and

FlexParentData.fit.

mainAxisAlignment

Supported values:

MainAxisAlignment.start

MainAxisAlignment.end

MainAxisAlignment.center