Display Custom Logo and Display User Full Name in Navigation Bar in 17.1

Hi everyone,

I am using Appian version 17.1 and I would like to 

1) replace the Top-RHS-Corner Appian Logo with a custom one; and

2) show User's Full Name (instead of just an icon now)  Top-RHS-Corner 

Instead of using site, is there any ways to do so in a Tempo page ?