Answers for "css wifth fixed element"

how to middle fixed element

position: fixed;
	top: 0;
	z-index: 100;
	left: 50%;
	transform: translateX(-50%);

fixed within the div css

#wrapper { width: 300px; background: orange; margin: 0 auto; position: relative; }
#feedback { position: fixed; right: 0; top: 120px; }

<div id="wrapper">
    ...
    <a id="feedback" href="#">Feedback</a>
</div>