Has anyone figured out how to flick between mobile and desktop versions on their phones?

I have flicked to desktop but want to see how it looks on mobile now the board has some content but I can't find how to change back.

On android at the bottom right hand side of the screen there is three diagonal lines. Hit that and it gives you mobile or desktop option.

Thanks. On Safari I just found it. Right at the bottom in the very middle there's a button that says "Mobile". Looks a bit messy back mobile mode.