Phabricator's builtin editor supports two kinds of Lists: numbered and unordered:
{F645227}
Both just enter the symbols ` - ` and ` # ` in the next line, relative to the current cursor position.
Often when these elements are used, multiple elements have to be inserted. When one enters the first element and presses `Enter`, a new, blank line is started.
It would be better in that situation, if the next line again would start with another ` - ` or ` # ` instead, so one can type all the points right away.