Hello Andrew,
It seems that stephencottontail found what was wrong- and what I could not understand – (WordPress considers your child theme a different theme from the parent, so you’ll have to reapply your header image and your custom menus. Go to your Dashboard and check under Appearance > Header and Appearance > Menus and see if you need to reapply any changes you made in the parent theme. )
Now…back to square one: I could hide the main menu at the top of the page and to keep just the Menu on the left side.
The site now looks like this: https://www.technosource.net/3Dprinting/
The original – and still pending issue – is: how I hide the subpages, having them coming out just if I pass the mouse on the Main page?
The Twenty Fourteen Child: Stylesheet (style.css) looks like this
/*
Theme Name: Twenty Fourteen Child
Theme URI: https://example.com/twenty-fourteen-child/
Description: Twenty Fourteen Child Theme
Author: John Doe
Author URI: https://example.com
Template: twentyfourteen
Version: 1.0.0
Tags: light, dark, two-columns, right-sidebar, responsive-layout, accessibility-ready
Text Domain: twenty-fourteen-child
*/
@import url(“/3Dprinting/wp-content/themes/twentyfourteen/style.css”);
/* =Theme customization starts here
————————————————————– */
THANKS A MILLION!!!