How to do \hrulefill in LyX without a TeX inset

Question

A very similar, but significantly different question is LyX command(s) to insert WYSIWYG horizontal line, for keyboard shortcut.

I'm trying to achieve the effect of \hrulefill in LyX, without resorting to an ERT (TeX code inset).

The example is the following:

Name and section:\enspace\hrulefill

All of the Width: options for Insert>Formatting>Horizontal Rule don't seem to achieve the same effect as \hrulefill, since they require a % of, or some fixed width, and aren't as dynamic. Is there some way to achieve this using the LyX interface?

Answer 1

Insert ▷ Formatting ▷ Horizontal space.

Spacing: horizontal fill

Fill pattern: __________

Answer 2

You can add a Custom Inset by adding to your Document > Settings... > Local Layout

Format 49
InsetLayout "Flex:HRuleFill"
    LyXType          Custom
    LabelString      HRuleFill
    LatexType        Command
    LatexName        hrulefill
    Decoration       classic
    LabelFont        
        Color        blue
        Size         Small
    EndFont
    ResetsFont true
End

This should add an HRuleFill inset:

It's similar in nature to an ERT in my opinion.