About z-index

What determines the level of z-index?

header {
background-color: #333333;
position: fixed;
width: 100%;
z-index: 5;
}

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Hey @hanbhin,

That does not really matter as longs at the element you want to show on top has the highest number.
Note, z-index only works with items which are outside of the html flow. (i.e. position: fixed).

More info on that:

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I really appreciate your reply, Thanks a lot!!