My Samsung s6 won't let me see the full Wifi connection screen!

[bribriw]

I'm trying to log into a wifi server and when I connect to the server in settings, it brings me to a login page, but the place to put in information is all the way to the left side of the screen. My phone won't allow me to go over there and is stuck so I can't input any info. I was able login on my laptop, so the site works, my Samsung Galaxy s6 won't let me access the full screen though! please help

 

[B. Diddy]

Welcome to Android Central! Is this a wi-fi login webpage that's coming up in the browser, or in a separate smaller window?