how to format the typewriter scrolling leader

I was wondering whether it is possible to format the typewriter scrolling leader, and in particular to change it from being a series of underscores to being a series of dots. Any suggestion?
Many thanks,

I’m not sure if this is what you’re referring to, but if you mean tabbing in the editor, this would just be an underline (for instance when using Copy Special > Copy Documents as TOC); the available options are under Format > Font > Underline.

Okay. Yes, that’s what I meant. Many thanks,