When I save a file as .html

I can type html and it writes many tags. And If I do head then it writes the head tab.

How can I view all these autocompletions? edit them? add to them?

The html is a snippet, “HTML/html.sublime-snippet”. The head is provided by “HTML/html_completions.py”. You can view them using the packagecontrol.io/packages/Pack … urceViewer package.

Under the “Tools” menu you can select the “Snippets…” menu item to display a menu of all of the currently available snippets based on the current context.