Drupal 8.x

Hello friends before starting with some activites over here i want to learn that how it works iam searching about it and not getting proper info can anyone help.

I'm on D8 and have a site page set as the front page. Set /node/4747 as the default in site settings. When looking at some of the link rel attributes listed after the meta tags the actual node url is displayed <link rel="alternate" hreflang="en" href="http://local.example.com/node/8454" /> and haven't been able to figure out a way to have it display http://local.example.com/ instead of the actual node url. Is it possible to change or overwrite this? 

Hello everyone, hope everything is doing well, so Im new on this huge Drupal universe and on this website, and I hope that I posted this problem in the correct section. :)

So my problem is that I have a bunch of menus, tried to create a sub menu, and nothing is created/rendered, and obviously not showed too.

When I look on the html result, I don't find any sub menus I created, and even when I try to dump [dump(item)] the menu items on the menu--main.html.twig, I can't find any sub menu.

Hello, I have a question with the Webforms form module.
I have installed in one of my sites and I have an email confirmation and an autoresponder is sent when the form is sent, this response is sent instantly, my question is: it is possible to schedule this autoresponder to be sent after 5 minutes , for example?

Thank you

I discovered today that Drupal 8 only allows you to add menu items in a maximum of 9 levels.

I understand this is more than enough for most users, but I'm using the menu system to organize pages for a choose-your-own-adventure game, and need around 15 menu levels.

There is a variable "MAX_DEPTH = 9" in the file core/lib/Drupal/Core/MenuMenuTreeStorage.php where I guess the value is set.

Is there some way to change this value? I tried changing it directly in that file to see what happened, but that gave me a blank website and a DatabaseExceptionWrapper error.

The Elementor drag 'n' drop layout system which apparently is wildly popular on Wordpress has a version available for Drupal 8. I grabbed a copy and noticed a lot or people had difficulties. The first thing I noticed wasn't coded appropriately was using a multiple term custom content type. I tweaked my copy to adjust that plus other issues and pumped out a quick youtube video. Has anyone else tried Elementor for Drupal 8?