'Updating margin values in view inspector has no effect on layout

I am following this tutorial and am unable to make Box Three line up to the top of Box Two (which she shows how to do at around 1:45 in the video).

As you can see in the screenshot, I try setting the top margin to 0 but it has no effect on the layout. If I inspect the value again, I see that it has gone back to 16. I am really unsure what I am doing wrong here as I have been following the video quite closely. The tutorial is quite old from 2016 and I am using the newest version of android studio (bumblebee).

Screenshot of me setting the value to 0 but not having any effect on the display: enter image description here

How can I make the margin 0??



Solution 1:[1]

In Box three set height as

    android:layout_height="0dp"

then it will will start from top of box two top( both will be equal )

Sources

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Source: Stack Overflow

Solution Source
Solution 1 sasikumar