In the twenty eleven theme function.php there is a filter to show the home menu item, copy and use this filter and it will work, I have already changed the function name and tested the code.
I’m new to the code, and I saw code suggestions that should do this, and I tried pasting them into the functions file.
If you are going to change the theme it would be best to create a child theme and work with that.
Edit Start
I see you mention notepad, have a look at a syntax highlighted editor like Notepad++ and as you are windows check out InstantWP so you can work local, test before updating a production website.
To create a child theme for this theme, create a folder then, add a file style.css
/*
Theme Name: Parament Child
Description: Child theme for the parament theme
Author: Your name here
Template: parament
*/
@import url("../parament/style.css");
Then create a file functions.php file starting with a php tag
<?php
/**
* Parament Child themes functions.php
* Custom functions and over-rides go in here
*/
/* Show Home Link in Menu */
function my_page_menu_args( $args ) {
$args['show_home'] = true;
return $args;
}
add_filter( 'wp_page_menu_args', 'my_page_menu_args' );
Copy the screenshot.png from Parament to the child theme, make changes and activate!
Any latout files you want to change you will then copy the file from the parent to the child, lets say changing the footer credits, copy footer.php across and make the change in the child theme.
Back to the topic:
To show the home link in the functions.php add:
/* Show Home Link in Menu */
function my_page_menu_args( $args ) {
$args['show_home'] = true;
return $args;
}
add_filter( 'wp_page_menu_args', 'my_page_menu_args' );
HTH
David