Hi Hamid,
Let me start with the ‘bad news’: The Twenty Twelve theme supports only ONE menu. Since you want two or more, it is best to select another theme.
There are many free, good working, alternatives available that do support more menus.
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Here some hints, tips and tricks to help you make a good start…
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When you have selected and installed a new theme, make sure you create a new childtheme for that theme.
Make changes to styling and php-files in the folder and files of the childtheme.
> Copy php files / css-file(s) of the original theme [as required] to the childtheme directory and edit them as required.
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About finding out ‘which things to change in your site [css / html / php]
Well it’s all a bit like trying to solve a puzzle.
Fortunately there are good tools for that.
In your browser: Install / activate webdevelopment add-ons / plugins.
Recommended: ‘Firebug’ and ‘webdeveloper’ by https://www.chrispederick.com ‘
These tools will show you ‘what’s what’.
e.g. right-click > inspect elements > click left bottom arrow-icon
click item in webpage
Inspect css on the right
alter css values to test effect / result
OK? copy altered css rule
paste it in the style.css
of your childtheme.
Alternatively:
Press <F12> a screen will show in the bottom.
Move the mouse over each line
The area shows in the top-half
Press + to unfold parts
Investigate and alter on the right etc.
paste it in the style.css
of your childtheme.
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!!IMPORTANT!!
ALWAYS Make a backup of your site, before making any changes!!
- Use FTP to access / backup the files of your site and it’s childtheme.
- Make sure to also backup your database.
- Use NOTEPAD++ or proper EDITOR [not wordprosessor] to edit css and php.
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No matter what, you’ll need a few basic skills to setup, create and manage a site.
- Basic computerskills: You should be / URGENTLY become confident at creating folders, downloading and installing files, copy-paste, basic editing, saving and renaming files, making back-ups
- You should definetly be / become confident at using FTP to upload and download files to your webserver
- You should be / become confident at reading and following manuals/instructions
- learn the basics of HTML
- learn the basics of CSS
- learn about wordpress
check out:
https://codex.www.ads-software.com/Main_Page
https://codex.www.ads-software.com/Using_FileZilla
https://codex.www.ads-software.com/Getting_Started_with_WordPress
https://codex.www.ads-software.com/CSS
https://codex.www.ads-software.com/Finding_Your_CSS_Styles
https://codex.www.ads-software.com/FAQ_Troubleshooting
All this should NOT stop you from enjoying and using WP!
If ‘all the technical stuff’ you feel is ‘way over your head’, and you would rather focus on the content, your readers etc. GREAT!
Get someone who LOVES the ‘nuts and bolts’ to help you set things up.
It might cost you a few bucks, but will allow you to do what YOU are best at…