Can you add the "go to first unread" button for mobile portrait mode?

It's really convenient, but I don't see it when browsing on my phone even though there's plenty of room for it. I've seen it on other XenForo boards so it should be possible.

EDIT: Changed my suggestion to have the button show up in portrait mode after having been informed it shows up on landscape.

 

If you can turn your phone landscape it shows up.

 

That works. Though switching to landscape just to find one button that there's plenty of room for in portrait is mildly annoying and others like me would not guess that it's an option, so I'll just change my request to have it show up in portrait mode.

 

You can do so from the thread list actually, it's the blue circle next to them. If clicked on it does that.

...or something similar, I think it might only go back so far, and it's less then ideal in placement and I believe function, to say the least.

 

The button you're thinking of has exactly equivalent functionality to the "go to first unread" button. They invoke the same forum feature. The button you're thinking of shows up in other thread lists too, such as the "Watched Threads" page.

(It's not going to be a blue circle for everyone, though. It depends on the theme. EG, I use "Dark Responsive (Green)", so for me it's a little green arrow. Same place though.)

But because they both use the same forum feature, there's a URL hack. If you're on the first page of the thread, add "/unread" to the end of the URL, then hit load.