Line icon for Mail Compose Toolbar doesn’t exist in v7.1 as it was in v6.

Now we have to waste time to do it, clicking every time on Menu-Insert-Line.

OK, you don’t want to put it there, we understand that.

But why there isn’t a shortcut in Settings-General-Shortcuts
to facilitate putting a Line?

And why you don’t allow us to create a shortcut inside of Settings?