If you are on mobile, there may not be? That dialogue at the bottom of the page I think it's supposed to be in a sidebar
In one of the settings there are a lot of menus / side bars that you can turn on that are off by default, it took some digging for me this morning to put all of that together
The mobile browser experience especially on iOS is not great but I know an app is coming
fwiw the desktop experience is tons better. under settings, make sure you turn infinite scroll off, so you can finally see where you are. happy hunting.