Upon working on org agenda, it's super convenient to employ
It display the original contents on other window instantly while scrolling around the agenda.
Toggle Follow mode. In Follow mode, as you move point through the agenda buffer, the other window always shows the corresponding location in the Org file. The initial setting for this mode in new agenda buffers can be set with the variable org-agenda-start-with-follow-mode.
When it comes to Dired Dired - GNU Emacs Manual
You have to invoke
C-o to achieve the same result.
Is it possible to enable
follow-mode in Dired?