Supposedly, newer versions of LyX have a command called \dotfill where one can obtain a string of dots such as in the following attachment.
I am specifically looking for (lower) dots which are analogous to a horizontal fill. Further, I would prefer to be in Standard mode when doing this (as opposed to in Table of Contents). When I enter math mode and insert \dotfill, nothing happens. How can I obtain these dots? If I have to add something to my LateX preamble, please share.
EDIT: When I enter \dotfill in LyX (in either inline or displayed mathmode) here is what I get