[TxMt] Display vertical rule but also wrap text to window

[Joseph Dan]

I like to use Soft Wrap. I also like to Use Window Frame as the Wrap Column. In other words, I like to wrap the text to the window.

How can we, completely independent of this, display a vertical line at a given column?

I can't do this with "Show Wrap Column" because it is connected to my Wrap Column setting. If I set that to 80, my Use Window Frame goes away.