In the main or home page, select one of a list of blogs and then point the cursor to select a layout option menu, look at the picture for more details :
The following options to add a menu page click add gadgets there are some options :
1. +1 Button
Let visitors recommend your content on Google Search and share it on Google+. By Blogger
2. Google+ Badge
Adding the Google+ badge to your blog helps you connect with friends, fans, and customers. By Blogger
3.Translate
Translate your blog into different languages. By Blogger
4.Follow by Email
Make it easy for readers to follow your blog by email. By Blogger
5.Popular Posts
Displays a list of popular posts on your blog. By Blogger
6.Blog's stats
Displays your blog's stats. By Blogger
7.Pages
Displays a list of stand-alone pages on your blog. By Blogger
8. AdSense
Earn revenue by displaying relevant ads on your blog. By Blogger
9. Followers
Displays a list of users who follow your blog By Blogger
10. Search Box
Search over your blog, your blogroll, and everything you've linked to.
By Google Custom Search
11. HTML/JavaScript
Add third-party functionality or other code to your blog. By Blogger
12. Text
Add some words to your blog - like a welcome message - with our rich text editor. By Blogger
Add a picture from your computer or from somewhere else on the web. By Blogger
14. Slideshow
Add a slideshow of your photos to your blog. By Blogger
Display clips from YouTube and Google Video for your readers to watch without leaving the page.
By Blogger
16. Poll
Survey your visitors by adding a poll to your blog. By Blogger
17. Blog List
Show off what you read with a blogroll of your favorite blogs. By Blogger
18. Link List
Add a collection of your favorite sites, blogs, or web pages. By Blogger
19. List
Add a list of your favorite books, movies, or anything you like. By Blogger
20. Feed
Add content from an RSS or Atom feed to your blog. By Blogger
21. Newsreel
Automatically add current headlines from Google News to your blog. By Blogger
22. Labels
Show all the labels of posts in your blog. By Blogger
23. Subscription Links
Let your readers easily subscribe to your blog with popular feed readers By Blogger
24. Logo
Choose from a variety of Blogger logos to add to your page. By Blogger
25. ProfileAlready added
Display information about yourself. By Blogger
select a desired menu, if you choose html insert your html code into a page, if it is click save, to see the results click on the preview button then the menu that you enter will appear in a new window, any reading above preview. if you want to add another menu click add gadget and select the menu you want there are about twenty-seven menus that you can use. good luck