Thank you all for tips. My elisp skills are pretty poor so I’m having trouble figuring out how to make this work, even copying examples online. For example:

(add-to-list 'display-buffer-alist '("*help*"
                                     (display-buffer-reuse-window)
                                     (display-buffer-in-side-window . ((side . right)
                                                                       (window-width . 0.5)))))

(add-to-list 'display-buffer-alist '("*info*"
                                     (display-buffer-reuse-window)
                                     (display-buffer-in-side-window . ((side . right)
                                                                       (window-width . 0.5)))))

With that in my init.el, if I open emacs and look up “help” it creates a new window on the right, which is the default behavior so I can’t say for sure if the code is doing anything. If I select a link in the help file (like the manual) that opens “info” it opens it back in the left window.

What am I doing wrong here?