I would like to have the pop-up with available completions and snippets appear automatically as I type in a .txt file with markdown syntax. I seem to recall this is possible, but I cannot recall how to enable it. Below are my possibly relevant settings. Thanks for any help.
"auto_complete": true,
"auto_complete_cycle": false,
"auto_complete_delay": 50,
"auto_complete_selector": "source, text, text.plain",
"auto_complete_use_index": false,
"auto_complete_with_fields": false,
"tab_completion": true,