How can I modify the mobile menu?

Hi there,

I wan to configure the mobile menu, so that the submenus are closed by first touch and open by second touch.

You can add this to your Appearance > Customize > Additional CSS area to make the mobile menu open by default, and close when you click Menu:

@media screen and (max-width: 44em) {
    /* Set Mobile Menu To Open By Default */
    
    .main-navigation ul {
        display: block;
    }
    /* Set Mobile Menu To Close When Menu is Clicked */
    
    .main-navigation.toggled ul {
        display: none;
    }
}

I wanna fix the mobile menu like the plugin mystickymenu. When I use the plugin, the nav-menu is fixed in desktop view, but not in mobile view.

For help with using the plugin, you can visit its support forum:
https://www.ads-software.com/support/plugin/mystickymenu

You may need to add more CSS to your site once the plugin is active in order to achieve the look you want there. Someone in the plugin forums may be able to assist you with altering the CSS for the plugin so that the plugin’s mobile menu appears the way you would like.