Following up on 's comment - I assume that the screen shot you've posted is a console of a virtual machine (perhaps a Linux server) that's not running a graphical environment.
if that's what you're doing. -TL;DR you can't scroll that display like you want to. There are alternatives that will allow you to do what I think you want to do.
The console display for a virtual machine behaves like a display connected to a physical machine. You can't scroll that either when running a non-graphical terminal session.
If you want scrolling, either ssh into the VM from Windows or run a graphical environment with a terminal app that does support scrolling.
Or do it the "old fashioned UNIX way". Direct the output of the command to a file and use a pager such as "more" or "less".
ifconfig -a > output.txt
more output.txt
Or even pipe the command you're running one of those pagers.
ifconfig -a | more