Xfinity Stream app-remote control functionality?

I’m trying out the Xfinity Stream app and will be using the app on my AppleTV device. 

I’m trying to understand what buttons control the app’s functionality. 

Such as is there a button to bring up the TV Guide?

Button for getting to my DVR recordings?

I guess I’m just looking for general remote functionality. For instance if I have a fully programmable remote are there IR codes for certain menu/guide interface buttons like you’d have on a cable box?