Check out example codes for "how to set the position of an image in html". It will help you in understanding the concepts better.

Code Example 1

<!-- There are five different position values: static, relative, fixed, 
   absolute and sticky -->

<!-- static -->
<head>
<style>
div.static {
  position: static;
}
</style>
</head>
<body>

<div class="static">
  This div element is static.
</div>

</body>

<!-- relative -->
<head>
<style>
div.relative {
  position: relative;
  left: 30px;
}
</style>
</head>
<body>

<div class="relative">
This div element is relative.
</div>

</body>

<!-- fixed -->
<head>
<style>
div.fixed {
  position: fixed;
  bottom: 0;
  right: 0;
  width: 300px;
}
</style>
</head>
<body>
  
<div class="fixed">
This div element is fixed.
</div>

</body>

<!-- absolute -->
<head>
<style>
div.relative {
  position: relative;
  width: 400px;
  height: 200px;
} 

div.absolute {
  position: absolute;
  top: 80px;
  right: 0;
  width: 200px;
  height: 100px;
}
</style>
</head>
<body>

<div class="relative">This div element has position: relative;
  <div class="absolute">This div element has position: absolute;</div>
</div>

</body>

// sticky
<head>
<style>
div.sticky {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  padding: 5px;
  background-color: #cae8ca;
  border: 2px solid #4CAF50;
}
</style>
</head>
<body>

<div class="sticky">I am sticky!</div>

<div style="padding-bottom:2000px">
  <p>The sticky element sticks to the top of the page (top: 0), when you reach its scroll position.</p>
</div>

</body>

Code Example 2

#IMAGE_ID {
	position:absolute;
  
  	/*left: (how much pixles from the left you want)px*/
  	left:100px;
  
    /*top: (how much pixles from the top you want)px*/
  	top:100px;
}

#MY_OTHER_IMAGES_ID {
    /*right: (how much pixles from the right you want)px*/
  	right:100px;
  
    /*bottom: (how much pixles from the bottom you want)px*/
  	bottom:100px;
}

Learn ReactJs, React Native from akashmittal.com