While you can open multiple tabs with the Windows Terminal or create multiple instances and tile them, sometimes it's a lot easier to have multiple panes visible at the same time and in the same window.

Windows Terminal makes it super easy to to do and if you installed WSL and a Linux distro, you simply have to launch the tmux utility. 

Here's my cheat sheet for Windows Terminal:

New vertical pane: Alt Shift +
New horizonal pane: Alt Shift -
Close the focused pane: Ctrl Shift W
Navigation: Alt Arrows or left mouse click 

and for tmux

New vertical pane: Ctrl B then %
New horizonal pane: Ctrl B then "
Navigation: Ctrl B then Arrows

 

References: