The Main Features Of Flex

Nice and Clean Design
Responsive Theme Layout
Elegant look
SEO Optimized
Fast loading Theme
Responsive Navigation Menu
Page navigation Widget
Customized heading tags (H1 to H6)

Edit Menu:

Go to Blogger.com > Your Blog > Template > Edit HTML and find the following code:

<div id='navigation'>
            <nav>
                <ul id='resnav'>
                  <li><a class='nav_link' href='/' id='nav_current' title='Home'>Home</a></li>
                  <li><a class='nav_link' href='http://flex-templateclue.blogspot.com/p/simple-page.html' title='Archive'>Page</a></li>
                  <li><a class='nav_link' href='/' title='Contact'>Contact</a></li>
                </ul>
            </nav>

Now change all of the links with your own.

Edit Admin Image

Go to Blogger.com > Your Blog > Template > Edit HTML and find ""

 <div id='icon_wrap'>

    <!-- Icon Image can be modified in #Icon CSS Rule -->
  <img id='icon' src='http://4.bp.blogspot.com/-z5kbk6UmfqY/VFmeejZeJrI/AAAAAAAAANQ/d8jw3D3u6Pk/s1600/Daksh.jpg'/>

</div>

Now Replace the Image Source with your own.

Edit Second Menu

Go to Blogger.com > Your Blog > Template > Edit HTML and find "<div class="categories">"

 <div class="categories">
    <nav>
        <ul>
            <li><a href="#" class="categories_link" title="Home">Home</a></li>
            <li><a href="#" class="categories_link" title="Photography">Photography</a></li>
            <li><a href="#" class="categories_link" title="Videos">Videos</a></li>
            <li><a href="#" class="categories_link" title="Travel">Travel</a></li>
            <li><a href="#" class="categories_link" title="Food">Food</a></li>
            <li><a href="#" class="categories_link" title="Culture">Culture</a></li>
            <li><a href="#" class="categories_link" title="Music">Music</a></li>
            <li><a href="#" class="categories_link" title="Technology">Technology</a></li>
            <li><a href="#" class="categories_link" title="Health">Health</a></li>
            <li><a href="#" class="categories_link" title="Movies">Movies</a></li>
            <li><a href="#" class="categories_link" title="Fashion">Fashion</a></li> 
        </ul>
    </nav>
</div>

Now Replace all the links with your own.

Add Buttons

1. In the Post section, click on edit post or create a new post
2. Click on HTML
3. A code is written above use that code to display that Button link

<a class="btn" href="Your Link" target="_blank">Your Text Here</a></div>

4. Save your Post and check.

Edit Social Buttons

<div id='social_media'>

        <ul>
            <li><a class='facebook' href='#'><i class='fa fa-facebook fa-lg'/></a></li>
            <li><a class='twitter' href='#'><i class='fa fa-twitter fa-lg'/></a></li>
            <li><a class='google_plus' href='#'><i class='fa fa-google-plus fa-lg'/></a></li>
            <li><a class='linkedin' href='#'><i class='fa fa-linkedin fa-lg'/></a></li>
            <li><a class='dribbble' href='#'><i class='fa fa-dribbble fa-lg'/></a></li>
            <li><a class='instagram' href='#'><i class='fa fa-instagram fa-lg'/></a></li>
            <li><a class='youtube' href='#'><i class='fa fa-youtube-play fa-lg'/></a></li>
            <li><a class='pinterest' href='#'><i class='fa fa-pinterest fa-lg'/></a></li>
        </ul>

    </div>

Post section

Note:- Use High Resolution Image Like In This Image.