1. Open LibreOffice that containing the macro
2. Click “Tools” -> “Customize…”
   
3. In Customize, Click “Keyboard” tab and scroll down the “Category” section until you find “LibreOffice Macros“. Select the macro.
   
4. Select the function that you want to assign the shortcut key in “Function” section and find the available keys in “Shortcut Keys” area. Select the key and click “Modify” button. Click “OK”
   

Original “Twenty Tweleve” theme does not have a search box at top right corner (same row with header).

Here are the steps taken to add a search box:

1. add a folder for child theme in same directory of parent theme, e.g. “/wp-content/themes”
2. name the folder as “twentytwelve-child-theme”
3. refer to http://zeaks.org/create-a-wordpress-child-theme/ on how to create a child theme
   • all modifications are done on child theme rather on parent theme
   • child theme copies/inherits all properties from parent theme
   • copy “header.php” from parent theme, “twentytwelve” to child theme folder, “twentytwelve-child-theme”
   • modify the “header.php” in “twentytwelve-child-theme”
   • modify the “style.css” in “twentytwelve-child-theme”
4. in the “Dashboard -> Appearance -> Themes”, choose the newly created child theme:
   • 

     finally, a search box has been added:
     

Source: http://zeaks.org/tutorials/twenty-twelve-theme-search-form-in-header/

There are 2 methods.

Method 1:  “Machine -> New” to manually select the existing “vdi” file

1. Refer to guide — www.arysontechnologies.com/blog/how-to-open-vdi-file/
   • Launch VirtualBox and create a new virtual machine. Choose an operating system among the choices given and click on Next button
   • Under Virtual Hard Disk, select Use existing hard disk and then click on the folder icon on the right
   • Now, a Virtual Media Manager window is opened. In that, click on the Add button and then select the VDI file which you want to open
   • Again, Virtual Hard Disk window is opened in which your new VDI is being shown and then click on Next
   • Now, your new virtual machine is started
   • After you have created, you may need to change the settings, e.g. network, as this “vbi” file was created using another machine/laptop.

Method 2: “Machine -> Add” to add “vbox” file

1. Goto “Machine -> Add” to add a virtual machine , e.g.  Linux Mint version 17 Cinnamon 64 bit, from “X:\VirtualBox Files\Linux Mint\Linux Mint.vbox” into your VirtualBox
2. After you have added/imported, you may need to change the settings, e.g. network, as this “vbox” file was created using another machine/laptop.