This corresponds to Drupal 7 issue: https://www.drupal.org/node/2021571
The custom menu add form has an element to show the machine name while the title is being typed. After saving, that machine name is not editable, but is shown on the edit menu form.
During creation (add), if the menu title is "hello," it shows the machine name will be hello. That's not what happens, though. The machine name is actually "menu-hello", and "menu-hello" is what is shown after saving.
Recent comments
It's great that everyone has a choice. I'm currently making a website where the H1 title is located at the top of the page in full width with a background image, 50vh height, how do you like...
Block title combo and 2/3 things
In the end, I use my <h1> with my custom layout just before the region for the content and i make a preprocess_theme for site_identity. <?php print theme('site_identity'); ?>...
Block title combo and 2/3 things
Choosing to not use the "Page title combo" block on content can also be helpful if you want to arrange the "Page tabs" menu and "Page title" differently.
Block title combo and 2/3 things